Hi Reunjith D Sasi,
According to my research, this error sometimes occurs due to Inbox rules. We can backup all your rules and then run /cleanrules command switch to starts Outlook and deletes all rules. Check if error can be reproduced.
1. Go to File > Info > Manage Rules&Alerts.
2. Click Options > Export Rules to backup your rules first.

3. After exportation, exit Outlook.
4. Press Win key + R to open the Run command.
5. type “outlook /cleanrules” and then press Enter.
Besides, in addition to Delegate Access, can you share folders with others?
If error continues, please follow the steps in this
official article to create a new profile.
Any updates, please feel free to post back.
Regards,
Perry
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