Cannot create folder Error

I note that this question has been asked before but I cannot find an answer.
The following error keeps occurring when I open emClient: [AirSync] cannot create folder “myemailaddress/UnitedKingdom/” … unknown error 11. This has happened since emClient asked me if I wanted to add holiday information to my calendar. I cannot find any way of reversing this. Please advise.

Hi,
can you try right clicking your calendar folder (the one you have problems with) and select Properties > Repair and hit the repair button.
It might fix the issue.

Thank you,
Paul.

I deleted the offending folder in Outlook and it is now ok.

Hi again, that’s great, glad it works now.
Let me know if you have any more issues or questions about the application.

Thank you,
Paul.