Unable to initiate screen control despite being able to share screens
I am unable to commence screen control with my co-worker. We can accept sharing of each other's screens no problem but not initiate control. We are on identical Mac hardware (Mac Mini) and software (13.3.1).
We have attempted to initiate this both ways round (her to me, me to her) and have tried this via Messages ("i" button > share) and 'directly' via the Screen Sharing prompt. After hanging for a minute with "Waiting for a response from...." we end up with:
A: When trying via Screen Sharing prompt "Connection failed to [user's email address], Unable to communicate with [user's email address.]"
or
B:When trying via Messages "Connection failed to [apple ID], Make sure the remote computer is available and the firewall is not blocking screen sharing."
Note that I am able to initiate screen control with other friends so my firewall settings are evidently fine. My coworker's settings are the same as mine.
Mac mini
