[Solved] Insert into post does not work

that's the entire message

JQMIGRATE: Migrate is installed, version 1.4.1

jquery.js:4 Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.

send @ jquery.js:4

ajax @ jquery.js:4

n._evalUrl @ jquery.js:4

Ha @ jquery.js:3

append @ jquery.js:3

(anonymous) @ jquery.js:3

Y @ jquery.js:3

html @ jquery.js:3

(anonymous) @ attach.js:34

i @ jquery.js:2

fireWith @ jquery.js:2

y @ jquery.js:4

c @ jquery.js:4

VM3422:15 Uncaught TypeError: Cannot read property 'top' of undefined

    at a.fn.init.jQuery.fn.visible (frontend.js:237)

    at HTMLButtonElement.eval (eval at <anonymous> (jquery.js:2), <anonymous>:15:21)

    at HTMLButtonElement.dispatch (jquery.js:3)

    at HTMLButtonElement.r.handle (jquery.js:3)

here's the link to a test page

https://theforgeclub.com/community/main-forum/andrezao/#post-2

feel free to register if you want to. Sorry about posting many messages, I've tried editing but it seems that I can't

Hi glauco,

This is a plugin or theme JS conflict. Let's start with plugins. Please deactivate all plugins, delete cache and test it again. If it works, activate them one by one and check after each activation to find the problem causer.