Report not refreshing - Error Message: Sequence contains no matching element

Morning datageekau thank you for posting up a work around to the thread. 

This is good advice, I did exactly the same thing to find the table creating the error.

However, when I brought the "problem" table in first it loaded OK, then all the other tables all loaded in one at a time, made sure all was working. However, when I did more work and brought new tables in the error returned! and I had to start all over again, but this time I knew the problem table. 

I did spend several hours with the Microsoft support team, and this is a bug that has been passed on to the product team for a fix. 

I fixed the issue by reverting back to June PBI version, but this has meant other issues due to reports I have built since June, giving me the "this file is built in a newer version and may not be compatible" error. 

The feedback that I received is that hopefully this bug will be fixed for the next version of PBI desktop.