The folder may have been deleted or moved.
Restarting Outlook doesnt solve the problem.
Lets explore what else you’re free to do to get rid of this error.
Launch Outlook, click onFile, go toOptions, and selectUpdate Options.
Hit theUpdate Nowbutton, drop in the updates, and restart the web client.
Repair Office
If the issue persists, repair your Office installation files.
Create a new user profile and peek if the issue persists.
Exit Outlook, start your system, and attempt to add a new task.