The error log you sent points to the failure of your CSV input. The job appears to be failing because some of your gene names end in a non-unicode space character encoded with bytes \xa0. I’ve never see that before. This stack overflow post might provide some context for what I am talking about.
Are you able to open your CSV file with an arbitrary text editor? Again: I’m not 100% sure how this error could have been introduced into the file. I just want to figure out how fatal this error is (i.e. is this an edge case we really should be supporting).
FYI as discussed in this post, every failed MapMyCells run ought to give you the ability to download the log file containing the specific error that caused your job to fail. We’ve tried to make the error messages clear enough that users can understand what happened (but sometimes we fall short of this goal).