Conditional question

Greeting, I am in need of support.
I can not see options for my second question when i preview the form or on the online validator. I as well cant deploy the entire form due to this particular question as there are duplicates despite the allow_choice_duplicates setting on the xls form
Please advise
Note
first question- list diagnosis
second qn choose code (subset of diagnosis with other subsets within).
example . diagnosis RESP.
Code under RESP has A,B.C.
thanks

Welcome to the community, @arnold_23cambghp! What do you see when you validate your XLSForm though this online validator?

Thanks @Kal_Lam.
this is what it looks like.