Level 3 Assignment 2 IE Dialog Download Completed

I had unit tested a workflow and an activity was executed dozens of times but today it won’t recognize the element exists although I see it highlighting the element a number of times. I tried other elements on the dialog. Repeatedly I have been at this and it won’t work. This is not the first time from one day to the next a selector won’t identify. I am wondering if I have a technical problem as selector inconsistency has been majority of my project time. I would be concerned it was a latency issue if it wasn’t a “Wait” command. Any ideas? Thanks in advance.

Just in case. I’m going to do an installation update immediately