I've got the following error in my Internet browser whatever I do:
Software error:
Died at C:/PROGRA~2/OTRS/OTRS//Kernel/Config/Defaults.pm line 2387.
Let me tell how I came to this, if it can help to find a solution.
I noticed that Tanzania was not in the list of CustomerCompanyCountry (don't know why, by the way), so I added it in Kernel\Config\Defaults.pm in my test environment. It worked.
Then I saw Defaults.pm must not be edited, so I set it as before, and copied the whole CustomerCompany block into Kernel\Config.pm. It worked.
Then I copied both files into my production environment. It did not work, and now OTRS does not work at all, giving me the error above.
I tried to put Config.pm back as before. Still the same.
I don't have the old original Defaults.pm of the production environment. Is this file dependant on the environment?
Please help! I feel like I have played with fire somewhere, and don't know how to get out of this deadlock

Regards,
HervE