Level 3 Binning Giving Error message after I have updated SNAP

I was having success with the Level 3 Binning to average the my level 2 OLCI datasets together. I updated my SNAP to the newest version and all of a sudden the Level 3 binning will not work. Same datasets, and parameters I used previously. I am not sure what happened or if there is a bug in the new version? Please see picture for a description of warning I get from running the Level 3 Binning. The error is also a bit odd, as it says it cannot find the file it is producing.

Thank you for any insight into this problem.

This is strange.
Can you show me the parameterisation? Please use File / Save Parameters… from the menu and attach the file. Also, a screenshot of the IO parameters could be helpful.