Description
So it happened, Like this,
In order to revert back the changes I did to module's Views and their related controller, model, etc.
I clicked Generate Module by going to each module in the Module Listing.
I also clicked Generate Module in the Default Modules.
I didn't noticed it then, but when I tried to go to the Roles/Users/Employee modules (which are the default modules). I found the code related to these modules changed/deleted.
So many functionalities like change password, Permissions View etc. were removed.
There should've been a check to not being able to generate these modules or something.
Or these views and code which is specific to the default modules should've been separated out from the common code of each module.
It made my head scratch for an entire day on who made these changes.