I created a spreadsheet that contains a sheet named "errors". Copy that sheet to your spreadsheet and change one formula. The errors should be highlighted in red.
See the directions sheet.
Make sure you check each sheet used in Formmule.
Then delete the extra hidden sheets.
Then open each template and make sure there are no columns with row one being black. These are likely status columns added by Formmule because it was confused. Delete the extra columns.
Make sure to hide all of the templates such that the first sheet is the one that you want to use in Formmule.
Try Formmule again.
If you still have problems, consider creating a new output destination from the Google Forms Responses.