Step as below:
1/ Open pop up to create new meeting.
2/ Set up a recurring for meeting and select a room
3/ Click x icon to discard this new meeting
4/ After that i got this screen
5/ When click refresh Window button and back to that time. owa create that meeting automatically no matter how i discard it.
6/ View in F12 development view, this error showing:
How to fix this issue?