Hello,
First, here is my website. (Which currently runs on Wordpress 4.9)
I just installed this plugin and since I could post with my admin account I thought it worked like a charm, but then I tried to post with a normal user account and I get this error :
Okay, it seems that this :
function restrict_access_admin(){
if ( current_user_can('subscriber') ) {
wp_redirect( home_url() );
exit();
}
}
In my function.php file was the culprit.
Everything works fine since I removed it : problem solved.
I think this error can be caused by a lot of things. In my case I installed a plugin called "The GDPR framework" by codelight and that one conflicted with wpdiscuz. I deactivated that one and everything was ok again.