Ooops! User error. I submitted my input to Ufile Online via their online procedure along with the problem description and the next day they replied to say that my date ranges for the medical claims were invalid or out of range. I.e. for the opening range I had entered 1921 instead of 2021.
A big mistake but hard for me to spot as Ufile usually catches errors like this. I suggested they consider updating their edit of this field but because it is a text-like field they may not be able to do that. It might be better then, to isolate the ranges in a separate date range field and just leave the text for the claim description.
A big thank you to Ufile for this new procedure of examining your input and then for spotting this. I had bought the premium phone package and don't know if that include this feature of submitting input or not. Phew! now I can file with about $3-$4K savings.