Common module 3.4.54 error

I tried to upgrade the IfffServer to 3.6.19 and before I could do that I had to update Common to 3.4.54 and now I am getting:
Warning: require_once(/var/www/html/modules/Common/TraitModule.php): Failed to open stream: No such file or directory in /var/www/html/modules/EasyAdmin/Module.php on line 33

Fatal error: Uncaught Error: Failed opening required ‘(/var/www/html/modules/TraitModule.php’ (include_path=‘.:/usr/share/php’) in /var/www/html/modules/EasyAdmin/Module.php on line 33

You should enable Common 3.4.54 first.

Double check the path of files specified in Module.php on both easyadmin and common module. Also check that files have the correct permission.

Line 33 of EasyAdmin has always been require_once dirname(__DIR__) . '/Common/TraitModule.php';, so it is looking inside Common, and it is the same for all new modules i manage. If it is not, it should be related to a custom or out-of-date module.
In your case, find the module that uses ‘/TraitModule.php’. Or copy it at the root of the directory “modules”.