I used another mod as a reference and changed the data of the sectors and positions of the gates (in the DAT file).
I changed the ID and description in the (.xml) file. with a little help from ChatGPT.
I start the game, the mod is recognized, but I can't subscribe to it. Or should I say I can click on subscribe and restart, but the mod was not subscribed to.
What am I missing?

What is the .CAT file for?
I am very grateful for any help