Thank you for your response!
I am French and I don't understand English. I use an online translator. Excuse me if I'm being silly.
I have loaded and installed the OXCE+! Everything works.
But there is no training center.
So I extracted the "mod" Training Pool from the TWoTS package.
Everything now works in UFO and TFTD.
Of course, the image of the training centre is not optimised for UFO.
Translated by
https://www.deepl.com/translator