The message appears when a file submitted in the Data Inputs has some rows with a different number of columns.
If Excel is able to open this file, you can open it in excel and re-save it as csv, or cut and paste the data into a separate csv.
Alternatively, this is an Excel issue and there are a few things that might be causing the issue:
- In your Excel tab, find the right most column, select everything to the right of it and hit delete. This is in case there are blank cells with spaces, etc.
- The file you are uploading has multiple header lines at the top. You can delete these and re-upload the file. If you open the file up in a text editor you may be able to see where the line breaks are in your data.