Compatibility Check fails on production site

Hello @midnitedev

I am sorry about the issue you are experiencing and I am happy to assist you with this.
Once the Compatibility checin is initiated, you should get:
Request URL: https://yourwebsite.com/wp-admin/admin.php?page=w3tc_dashboard&w3tc_test_self&_wpnonce=XXXXXXXXXX and return 200 OK
There is a chance that some rules on your host or some Security plugin may be blocking the request since the compatibility check detects modules and extensions on your server.
I hope this helps!

Thanks!

Hi Marko, yes but instead of the 200, I’m receiving the 500 error on production and just shows the loading icon indefinitely. But on local, it successfully shows the correct stats. Are there any particular files that I should look into that causes it?

There are no other references to the error on the server side except for this: httpd access log shows /wp-admin/admin-ajax.php?action=w3tc_ajax&_wpnonce=xxxxxxxxx&w3tc_action=pagespeed_widgetdata&_fs_blog_admin=true HTTP/1.1″ 504

Hello @midnitedev

Thank you for your feedback. Have you checked the wp_debug log also?
A 504 means your web server didn’t receive a timely response from another server upstream when it attempted to load.
As I’ve mentioned before, most likely some other plugin is blocking the ajax call.
Have you tried disabling the r plugins and do you have any security plugins?
Thanks!