Never said that this is causing the issue you have. But you have your pages CRASHING and that is serious. They do NOT complete.

I have no idea what you are talking about, please speak in english.

@kedy First remove the WP_Optimize from your wpForo page. We have talked here several times about, you can search for it. Why everyone keeps caching...

@adriaan I think they use not sure about it.

wpForo forum plugin doesn't have lightbox or whatever popup for images. So this comes from some lightbox plugin or your theme?

You have JS crashes: Uncaught Error: Bootstrap's JavaScript requires jQuery version 1.9.1 or higher, but lower than version 3 <anonymou...

Ok. Press f12 while browsing the forum and check your BROWSER console for errors. You will see it. Now it SEEMS to come from this: script><?...

This must be removed from wpForo pages !!! <!-- Cached by WP-Optimize (gzip) -- Last modified: Mon, 05 Jul 2021 08:54:11 GMT -->

@utpal235 maybe not related but your page has issues (crashes). Press F12 to check it and fix it. Uncaught TypeError: window.dojoRequi...

There is an issue on the page of the forums, press f12 to see it and fix it ! Uncaught SyntaxError: expected expression, got '<'

@virtualprofitlife I use Neve theme and 31 plugins. Along with wpForo. Not a single issue. And some 30.000+ installations use wpForo (according to W...

@ediko There is no wpForo SEO plugin. It is included as a standard feature. And to ALL, Yoast is a heavy beast, use SEO Framework.

@kevintian Still all those issues have nothing to do with wpForo plugin.

What all that has to do with wpForo?

How can we know? Enable Wordpress Debug to a LOG and check that file.