Not working with bigger files - Unknown Error - wpForo Advanced Attachments https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/ WordPress Plugins Support Forum en-US Tue, 21 Apr 2026 08:00:10 +0000 wpForo 60 RE: Not working with bigger files - Unknown Error https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/paged/2/#post-42136 Thu, 28 Aug 2025 10:23:33 +0000 @frank-schroeder 

We checked your message and the PHP values you’ve already set are high enough, so the issue is not related to PHP limits.

The Advanced Attachments addon works fine and allows uploading large files over HTTP/1.1, but once the server is switched to HTTP/2, only smaller files can be uploaded. Large file uploads fail under HTTP/2.

This looks more like a server or HTTP/2 protocol limitation (buffering, timeout, Nginx/Apache configuration, or proxy settings), rather than a wpForo issue.

Please contact with hosting provider.

]]> wpForo Advanced Attachments Astghik https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/paged/2/#post-42136 RE: Not working with bigger files - Unknown Error https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/paged/2/#post-42085 Thu, 07 Aug 2025 08:41:13 +0000 Hi
sorry for my late reply - had some very busy days :/

This is what I have installed on my server:

Perl version 5.032001
Path to Perl /usr/bin/perl
Python version 3.9.21
Path to Python /bin/python3.9
BIND version 9.16.23
Postfix version 3.5.25
Mail injection command /usr/lib/sendmail -t
Apache version 2.4.62
PHP versions 8.4.11
Logrotate version 3.18.0
MariaDB version 11.8.3
]]> wpForo Advanced Attachments Frank Schroeder https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/paged/2/#post-42085 RE: Not working with bigger files - Unknown Error https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/#post-42078 Fri, 01 Aug 2025 10:41:04 +0000

Please let us know which server you are using — is it Apache, Nginx, or LiteSpeed?

What about this? 

]]> wpForo Advanced Attachments Astghik https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/#post-42078 RE: Not working with bigger files - Unknown Error https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/#post-42077 Wed, 30 Jul 2025 11:12:08 +0000 @astgh oh those I've put very very high :)
I don't like running in issues due to those

php_value = 3600
php_admin_value = 1024M
php_admin_value = 16G
php_admin_value = 16G
php_admin_value = 3600
php_admin_value = 3000
php_value = 1G

 

So at least in my opinion these value should be high enough

And like i wrote with the old HTTP1.1 it works fine - just not with HTTP2 and all my sites are normally the new http2 version

]]> wpForo Advanced Attachments Frank Schroeder https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/#post-42077 RE: Not working with bigger files - Unknown Error https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/#post-42076 Wed, 30 Jul 2025 11:06:21 +0000 @frank-schroeder 

Please let us know which server you are using — is it Apache, Nginx, or LiteSpeed?

Also, please check the following settings in your php.ini file:

  • post_max_size

  • max_execution_time

  • max_input_time

  • memory_limit

]]> wpForo Advanced Attachments Astghik https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/#post-42076 RE: Not working with bigger files - Unknown Error https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/#post-42073 Tue, 29 Jul 2025 11:16:46 +0000 Perfect - thank you very much :)
Like written I deactivated for now the http2 protocol so that I can upload larger files and also multiple files without an issue - maybe also I need to add something on my server but i think the devs will know :P

Also I saw when uploading files with http2 that the upload is less slower than with the old http1.1 which shouldn't be like this - maybe both are related

]]> wpForo Advanced Attachments Frank Schroeder https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/#post-42073 RE: Not working with bigger files - Unknown Error https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/#post-42071 Tue, 29 Jul 2025 10:40:15 +0000 @frank-schroeder 

The wpForo Advanced Attachments addon stores files in its own media library and does not insert them into the WordPress Media Library. All attachments of all user libraries are stored in /wp-contnet/uploads/wpforo/attachments/ directory.

Regarding the main issue, I’ve already contacted the developers. I’ll update this topic as soon as I receive a response from them.

]]> wpForo Advanced Attachments Astghik https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/#post-42071 RE: Not working with bigger files - Unknown Error https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/#post-42066 Mon, 28 Jul 2025 11:50:53 +0000 What helps a bit is editing the htaccess file

# fix http2 protocol error
<IfModule mod_substitute.c>
SubstituteMaxLineLength 50M
</IfModule>

but when uploading multiple files it turns into the same error - deactivating http2 works

 

By the way why aren't the files visible in the media manager within Wordpress? Where are the stored in case of clean up?

]]> wpForo Advanced Attachments Frank Schroeder https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/#post-42066 RE: Not working with bigger files - Unknown Error https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/#post-42065 Mon, 28 Jul 2025 11:29:50 +0000 In the browser console I see this here and I can confirm deactivating the http2 protocol for this specific site make it work - does your plugin have an issue with http2?

 

jquery.min.js?ver=3.7.1:2 POST https://myurl/wp-admin/admin-ajax.php?lang=en&page_id=17147&wpforo_boardid=0 net::ERR_HTTP2_PROTOCOL_ERROR
send @ jquery.min.js?ver=3.7.1:2
ajax @ jquery.min.js?ver=3.7.1:2
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e.<computed> @ jquery-migrate.min.js?ver=3.4.1:2
send @ jquery.fileupload.js?ver=3.2.3:1011
_onSend @ jquery.fileupload.js?ver=3.2.3:1081
(anonymous) @ jquery-ui.min.js?ver=1.12.1:6
data.submit @ jquery.fileupload.js?ver=3.2.3:761
(anonymous) @ wpfa-jquery.fileupload-ui.js?ver=3.2.3:127
c @ jquery.min.js?ver=3.7.1:2
fireWith @ jquery.min.js?ver=3.7.1:2
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t @ jquery.min.js?ver=3.7.1:2
(anonymous) @ jquery.min.js?ver=3.7.1:2
e @ jquery.min.js?ver=3.7.1:2
t @ jquery.min.js?ver=3.7.1:2
setTimeout
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c @ jquery.min.js?ver=3.7.1:2
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c @ jquery.min.js?ver=3.7.1:2
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setTimeout
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setTimeout
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c @ jquery.min.js?ver=3.7.1:2
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setTimeout
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fire @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
fireWith @ jquery.min.js?ver=3.7.1:2
e @ jquery.min.js?ver=3.7.1:2
t @ jquery.min.js?ver=3.7.1:2
setTimeout
(anonymous) @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
fireWith @ jquery.min.js?ver=3.7.1:2
fire @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
fireWith @ jquery.min.js?ver=3.7.1:2
e @ jquery.min.js?ver=3.7.1:2
t @ jquery.min.js?ver=3.7.1:2
setTimeout
(anonymous) @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
fireWith @ jquery.min.js?ver=3.7.1:2
fire @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
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e @ jquery.min.js?ver=3.7.1:2
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setTimeout
(anonymous) @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
fireWith @ jquery.min.js?ver=3.7.1:2
fire @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
fireWith @ jquery.min.js?ver=3.7.1:2
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setTimeout
(anonymous) @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
fireWith @ jquery.min.js?ver=3.7.1:2
fire @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
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setTimeout
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fireWith @ jquery.min.js?ver=3.7.1:2
fire @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
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(anonymous) @ jquery.min.js?ver=3.7.1:2
e @ jquery.min.js?ver=3.7.1:2
t @ jquery.min.js?ver=3.7.1:2
setTimeout
(anonymous) @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
add @ jquery.min.js?ver=3.7.1:2
(anonymous) @ jquery.min.js?ver=3.7.1:2
(anonymous) @ jquery-migrate.min.js?ver=3.4.1:2
e.<computed> @ jquery-migrate.min.js?ver=3.4.1:2
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e @ jquery.min.js?ver=3.7.1:2
t @ jquery.min.js?ver=3.7.1:2
setTimeout
(anonymous) @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
fireWith @ jquery.min.js?ver=3.7.1:2
fire @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
fireWith @ jquery.min.js?ver=3.7.1:2
e @ jquery.min.js?ver=3.7.1:2
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setTimeout
(anonymous) @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
fireWith @ jquery.min.js?ver=3.7.1:2
fire @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
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setTimeout
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c @ jquery.min.js?ver=3.7.1:2
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fire @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
fireWith @ jquery.min.js?ver=3.7.1:2
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t @ jquery.min.js?ver=3.7.1:2
setTimeout
(anonymous) @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
fireWith @ jquery.min.js?ver=3.7.1:2
fire @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
fireWith @ jquery.min.js?ver=3.7.1:2
e @ jquery.min.js?ver=3.7.1:2
t @ jquery.min.js?ver=3.7.1:2
setTimeout
(anonymous) @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
add @ jquery.min.js?ver=3.7.1:2
(anonymous) @ jquery.min.js?ver=3.7.1:2
(anonymous) @ jquery-migrate.min.js?ver=3.4.1:2
e.<computed> @ jquery-migrate.min.js?ver=3.4.1:2
then @ jquery.min.js?ver=3.7.1:2
(anonymous) @ jquery.fileupload-process.js?ver=3.2.3:83
each @ jquery.min.js?ver=3.7.1:2
_processFile @ jquery.fileupload-process.js?ver=3.2.3:69
(anonymous) @ jquery-ui.min.js?ver=1.12.1:6
func @ jquery.fileupload-process.js?ver=3.2.3:149
e @ jquery.min.js?ver=3.7.1:2
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setTimeout
(anonymous) @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
add @ jquery.min.js?ver=3.7.1:2
(anonymous) @ jquery.min.js?ver=3.7.1:2
(anonymous) @ jquery-migrate.min.js?ver=3.4.1:2
e.<computed> @ jquery-migrate.min.js?ver=3.4.1:2
then @ jquery.min.js?ver=3.7.1:2
(anonymous) @ jquery.fileupload-process.js?ver=3.2.3:154
each @ jquery.min.js?ver=3.7.1:2
process @ jquery.fileupload-process.js?ver=3.2.3:140
(anonymous) @ jquery-ui.min.js?ver=1.12.1:6
(anonymous) @ jquery-ui.min.js?ver=1.12.1:6
each @ jquery.min.js?ver=3.7.1:2
each @ jquery.min.js?ver=3.7.1:2
t.fn.<computed> @ jquery-ui.min.js?ver=1.12.1:6
(anonymous) @ wpfa-jquery.fileupload-ui.js?ver=3.2.3:114
e @ jquery.min.js?ver=3.7.1:2
t @ jquery.min.js?ver=3.7.1:2
setTimeout
(anonymous) @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
fireWith @ jquery.min.js?ver=3.7.1:2
fire @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
fireWith @ jquery.min.js?ver=3.7.1:2
e @ jquery.min.js?ver=3.7.1:2
t @ jquery.min.js?ver=3.7.1:2
(anonymous) @ jquery.min.js?ver=3.7.1:2
e @ jquery.min.js?ver=3.7.1:2
t @ jquery.min.js?ver=3.7.1:2
setTimeout
(anonymous) @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
add @ jquery.min.js?ver=3.7.1:2
(anonymous) @ jquery.min.js?ver=3.7.1:2
(anonymous) @ jquery-migrate.min.js?ver=3.4.1:2
e.<computed> @ jquery-migrate.min.js?ver=3.4.1:2
then @ jquery.min.js?ver=3.7.1:2
e @ jquery.min.js?ver=3.7.1:2
t @ jquery.min.js?ver=3.7.1:2
setTimeout
(anonymous) @ jquery.min.js?ver=3.7.1:2
c @ jquery.min.js?ver=3.7.1:2
add @ jquery.min.js?ver=3.7.1:2
(anonymous) @ jquery.min.js?ver=3.7.1:2
(anonymous) @ jquery-migrate.min.js?ver=3.4.1:2
e.<computed> @ jquery-migrate.min.js?ver=3.4.1:2
then @ jquery.min.js?ver=3.7.1:2
data.process @ jquery.fileupload.js?ver=3.2.3:742
add @ wpfa-jquery.fileupload-ui.js?ver=3.2.3:113
_trigger @ jquery-ui.min.js?ver=1.12.1:6
(anonymous) @ jquery.fileupload.js?ver=3.2.3:1154
each @ jquery.min.js?ver=3.7.1:2
_onAdd @ jquery.fileupload.js?ver=3.2.3:1147
(anonymous) @ jquery-ui.min.js?ver=1.12.1:6
(anonymous) @ jquery.fileupload.js?ver=3.2.3:1362
c @ jquery.min.js?ver=3.7.1:2
add @ jquery.min.js?ver=3.7.1:2
always @ jquery.min.js?ver=3.7.1:2
_onChange @ jquery.fileupload.js?ver=3.2.3:1350
(anonymous) @ jquery-ui.min.js?ver=1.12.1:6
r @ jquery-ui.min.js?ver=1.12.1:6
dispatch @ jquery.min.js?ver=3.7.1:2
v.handle @ jquery.min.js?ver=3.7.1:2

]]> wpForo Advanced Attachments Frank Schroeder https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/#post-42065 Not working with bigger files - Unknown Error https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/#post-42064 Mon, 28 Jul 2025 11:23:39 +0000 Hi

I just bought this addon to have the possibility to attach multiple files to my forum entries.

Unfortunately it doesn't work:

When using attach files I see in the top right of the page a spinning icon which disappears after some seconds. 

When Using My Media I see he starts uploading till about 30 MB and than stops in Error Unknown error

In my PHP and Apache error logs I see nothing - the upload limit in PHP and the Forum is set to 16GB so that shouldn't be a problem neither

I tried a dmg and an exe files with about 270MB and those don't work

Tested with smaller than 30MB and those work - so somewhere seems to be a problem with maybe a timeout or so but as I have nothing in my logs?

]]> wpForo Advanced Attachments Frank Schroeder https://gvectors.com/forum/wpforo-advanced-attachments/not-working-with-bigger-files-unknown-error/#post-42064