Creating or updating client

1

I am getting several times a day, error messages, like :

[CalDAV]Creating or updating folder ‘/Tasks’ failed due to the following error: Cannot create folder “Tasks” due to the following error(s): LGI-0003 Categories=ERROR Message=‘Unknown problem: “emailaddressde”.’ exceptionID=2006383582-12330801 (InternalServerError).
Will attempt to create folder on next synchronization.

How can I fix this please ?

2

The error says this is a server error. That would be a place to start, maybe they can offer some suggestion.

Otherwise, removing and re-adding the account to eM Client often solves issues like this. Always make a backup using Menu > Backup before removing an account, just in case.