Hi @michael lustig ,
I tried to repair office..create new profile/ new ost file.. reinstall of office...new folder called "outlook " In %appdata%.
From your description, what you have done didn't work.
In order to verify your issue, what's the detailed version of your Outlook?(File > Office Account > About Outlook)
What speical operations did you make before the issue happened?
Besides, to confirm whether it is related third-party add-in, try to run Outlook in safe mode and see if the issue persists:
Type outlook.exe /safe in the run command, if it works normally, the reason for the issue is due to some add-ins.
Here is an article on Start outlook in safe mode and disable add-ins for your reference.
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