Cornerstone Update Crashes Admin on Developer Site

[jsegalphoto]

Cornerstone updates to recent version and crashes back end and admin panel of my developer site wordpress install. Front end website is fine just blank screen with trying to load back end.

NOTE - on my LIVE site I have mirrored the same setup and updating X and cornerstone is completely fine, this behaviour only occurs on developer site. ??? …but why…?

Via FTP I’ve deleted Cornerstone before and everything returns to normal. Also I’ve manually one by one shut off all my included plugins to see if there is conflict but everything seems fine. I’ve also manually installed latest version of Cornerstone from the updated X-Theme download package and after activating same behaviour - admin backend crashes and does’t load when cornerstone activated.

When viewing X-theme options panel from admin X tries to automatically download cornerstone again as this is core functionality for X, after automatically downloading cornerstone, the admin page crashes again and white screen.

Do I need to do a fresh install of the whole thing?

WP Version 4.9.6
I’m running X version 6.1.5 with a child theme.
Plugins - contact form 7, cornerstone, envira gallery, slider revolution, sticky menu on anything, yoast SEO,

Please advise and thanks in advance!

[rad]

Hi @jsegalphoto,

Thanks for reaching out and I understand the frustration.

Though, I’m not really sure what’s causing this in your developer site so let’s do these first. Please check for the following first:

1. Ensure everything is up to date according to our version compatibility list at https://theme.co/apex/forum/t/troubleshooting-version-compatibility/195. Please follow the best practices when updating your theme and plugins. See https://theme.co/apex/forum/t/setup-updating-your-themes-and-plugins/62 for more details.

2. Clear all caches including browser cache then deactivate your caching plugins and other optimization plugins.

3. If you’re using a CDN, please clear the CDN’s cache and disable optimization services.

4. Test for a plugin conflict. You can do this by deactivating all third party plugins, and seeing if the problem remains. If it’s fixed, you’ll know a plugin caused the problem, and you can narrow down which one by reactivating them one at a time.

5. Remove custom CSS, Javascript and templates.

6. Reset your htaccess file by renaming it to .htaccess-bak. Then in WP Admin Menu, go to Settings > Permalinks and just click the Save Changes button.

7. Contact your host to increase your allocated memory or do it yourself by adding this code in your wp-config.php

define( 'WP_MEMORY_LIMIT', '256M' );
define( 'WP_MAX_MEMORY_LIMIT', '512M' );

7. Please downgrade your PHP version lower than 7.2 (if your PHP version is 7.2) but greater equal or than 5.6

Else, please provide your developer site’s URL, admin and FTP login credentials in a secure note. We could only find more details through error logs.

Thanks.