Error message: "Schedule C: Other Expenses Text-6 is invalid for E-Filing. Remove all preceding spaces...." But the pink-highlighted line in the form is blank. Help?

"Check E-file Status" won't allow me to file.  The error message is: "Schedule C: Other Expenses Text-6 is invalid for E-Filing. Remove all preceding spaces or invalid characters." But the pink-highlighted line in the form is blank--so there are no spaces or characters to remove! How can I fix this error?

Screen shot attached!