Doing normal product’s module customization (adding some custom fields) suddenly ModuleBuilder got broken and nothing else could be made. See image attached!
I have tried:
disabling AJAX for ALL the modules and also adding $sugar_config[‘disableAjaxUI’] = true; to my config_override.php.
Deleting all the files under /cache/modules and /cache/smarty/templates_c
Overwriting /modules/ModuleBuilder of the broken instance with the files from a suite’s installation zip.
I was customizing Product’s module fields, just that!
I have also made a Quick Repair and run all the JS related reparation tasks.
Also tested from different browsers and in chrome private’s mode!!
If you are able to send me an email I will give you access to the server to see!
I am having the exact same issue – I cannot run a custom module. I have tried several different approaches now. I did not try to create a custom module under 7.7.9, and I did install the upgrade to 7.8 this morning.