Welcome to the community, @nfo_fo! It seems like it’s an issue with the cascading select question type. Have you validated your XLSForm through this online validator? Validating there should help you identify syntax issues if any present.
Thank you very much!
Yes I already tried it, but there are no comments at all.
I’m a bit surprised because I do the same survey every year and it’s the same form as last year, so it should work. Thank you very much for your help.
You can find my form here ( I work on xlsx and then convert it in XLS):