Unexpected error: Evaluation was canceled

I have the same problem.  Sometimes my refresh works perfectly, other times i get this error, then have to manually go through each query, click on the steps and try to get it to work.  One "solution" is to delete text in a step, and then add it back.  Example - Table.SelectRows -> change to Table.SelectRow -> then change back to Table.SelectRows.

THen it does the evaluation.  

BUT THIS IS HIGHLY ANNOYING.. I have 30 queries in my PBi file an have to do this for 7-10 of them each time this problem surfaces.