I would PDF that Schedule from the "Forms" tab and then go to Screen 4.4, and "attach" that PDF to the e-file, making sure the check the box "Send PDF attachment with Louisiana return." TBD on the Form & line #, I don't have Louisiana clients, use "Other" if none seem to apply.

My bet is the diagnostic will then go away.

If it doesn't, if the diagnostic is informational, I wouldn't do anything further. If it doesn't go away, and the diag is critical, I would suppress error checking and e-file.