Error msg: Cannot create folder

Each time I invoke eM Client I get the following message:
Msn (JLonghurst6606):An error occurred
[AirSync] Cannot create folder “Msn. . . Will attempt to create folder on next synchronization.” I ignore it and everything appears to work but it is a nuisance.

Hi, have you tried to create any folder/subfolder? Could you check Outlook webmail if that folder is there and delete it if you have no data in it?