RingCentral + Pipedrive calls stop syncing

I’m using RC and Pipedrive for 3 months now and its working just fine. RC logs all calls to Pipedrive. However, just today, it stopped syncing and there is no option in RC app connect to log it to Pipedrive.

I uninstall and reinstall, clear cache, and everything basic stuff.

What I observe in Settings that indicated NO CRM selected, but when I clicked it, there is no dropdown option. After I refresh the page, this option is no longer visible, thus RC app connect cant linked to my Pipedrive