Your iPhone and mac must be on the same wi-fi network
After installing Monterey on my MacBook Pro Retina 13" early 2015, I have a problem to initiate a call from my MacBook via my FaceTime/iPhone. When the MacBook tries to start a call, I receive a FaceTime message "Your iPhone and Mac must be on the same Wi-Fi network", which they are. I tried several Wi-Fi networks but still getting the same message. I can still receive a call on my MacBook though. It worked seamlessly before the update. I spent some time on a call with Apple support but we ended up reinstalling Mac OS, which did not help. I consider whether I shall go back to Catalina, which was the last "no problem-Mac OS" for my MacBook but would like to keep this solution as a last resort...
What I did already: 1) turned off my devices, 2) checked settings - Wi-Fi calling on my iPhone is On, Calls from iPhone in Facetime on my Mac is On, 3) reinstalled Mac OS.
Thanks for your help.
Lubos
MacBook Pro 13″, macOS 12.0