Solved! How do you monitor computers with Veyon?

[the kings of pi]

I typed in the correct MAC address and IP address of my MacBook Pro onto the master computer, and I put a public key into the client computer as well. On the client computer (MB Pro), it said the file was locked and it could not do anything with it.

 

[Alabalcho]

Foru such highly-unpopular product, the best place to ask question is at their support forum
https://veyon.nodebb.com/

BTW - Product page does not list MacOS as supported.