This error has been happening a lot with many Non-English players. Generally, the ## will be replaced by your language identifier. Examples include FR for French, GE for German, ES for Spanish, and so on.

The way to fix this is to rename your file called "en_core_mod" to the correct language prefix.

For example, if your error says:

ERROR: Could not find zone: "ge_core_mod.ff"

You must be playing in German! To fix the error, go into the file, which is located on Widows in the Steam workshop content directory:

C:\Program Files (x86)\Steam\steamapps\workshop\content\311210\2234717115

Rename the file "en_core_mod.ff" to "ge_core_mod.ff", or whatever the missing filename was. That should fix the error!

Every time I recompile the mod, I make sure it builds in these languages, and yet people still report the errors. Besides manually renaming the file, I am unsure of the method to fix this issue. Sorry if this happens to you, and I hope this tutorial helps you fix the issue!