I have a reoccurring Teams meeting which was not cancelled or shows cancelled in my calendars but when I open meeting options, it shows, meeting has been cancelled. I can access my other reoccurring meeting's option without any issue.
Hello, I was involved in a similar discussion and that person had accidentally deleted several meetings in Outlook. When he restored the objects the problem disappeared. Can't say this will be applicable for you but you should at least start by checking that followed by a manual sign out / sign in using Teams, Outlook and clear your browser cache or use InPrivate / Incognito sessions. You can also join your meeting and enter the Meeting options from the "More actions" menu, but that is more of a workaround and will possibly not work depending on your scenario.