Users are unable to open emails in expd8 and getting this error every time and needs to close down Outlook to open them

The issue is caused by an Add ins from Microsoft called  "Microsoft Teams Meeting Add-in for Microsoft Office."  Disable this add in by unchecking it then close both Outlook and expd8 

and should be able to open emails again in expd8 conseccutively  without getting the error and even when Outlook is opened.