Please can we help to resolve that: ODK Validate Errors: >> Something broke the parser. See above for a hint. Error evaluating field ‘aKSz3kNfyaYsTjY9XxgZTT’

Welcome to the community, @temoinyah00000_00000! It seems like you have tried to use a variable name (that is within the repeat group outside the repeat group), as shown in the image below:

This is why you are getting the error message.

Maybe this post discussed previously should help you understand how to resolve it: