The license information is validated by reading the license file from my AZURE tenant. Does the user not have internet access on the computer where the form is used?
If they have, it might be a temporary network / AZURE issue that resolves itself. If they do not have internet access you can contact me to get a license code that is validated without having to read the license information from AZURE.
If they can see the DFFS configured form they have the necessary rights to the SPJS document library.
The error does not prevent saving the form data.
Let me know if you have any further questions.
Best regards,
Alexander