I just tried (9AM 6th Sep 2021 Australian Time zone) on Graph API v1.0, it's not working:
I have tried on our end and all our tenants, none of them working with version 1.0. This version has never worked since the beginning of August. Moreover, my original question is not about Graph API v1.0, because this version never worked, I was using Beta version, it works pretty smooth, but as I mentioned on my question ,even the Beta version was behaving abnormally. The response code was 200, which is fine, but returns nothing during 31st August to 1st Sep 2021 (Australian time zone), it comes back after 2nd Sep, what was going on and why your API v1.0 is working?