Outlook MAPI throws error creating Teams Meeting from calendar - c++

I have my own plugin written for Outlook MAPI in C++.
We have our own server code and client interacts with it using SOAP Req/Resp.
Now when we have Microsoft Teams installed on the PC. If someone opens Outlook, and goes to Calendar, it shows "New Teams Meeting" button on "Home" ribbon. If someone clicks it. It opens the new meeting compose button but on shows message box with error "We couldn't schedule the meeting. Please try again later". Once we click OK on that message box, it closes the compose windows and returns to the main windows.
But it works perfectly when someone follows path : Ribbon Home->New Items->Meeting. Now it opens new meeting compose windows. Now on the new meeting compose windows Ribbon Meeting->Teams Meeting and it perfectly works fine by adding Teams Meeting URL at the bottom in body.
Any idea what could be the problem? What's missing there?
Thanks in advance

Check whether this problem is related to the Teams add-in, see Teams in Outlook: We Couldn’t Schedule the Meeting.

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