In order to make remote connection to mac os x 10.14 and above, it is necessary to make a pre-configuration on that computer.
You can do this while you are at that computer.
system preferences ---> Security and privacy ---->
Accessibility : The box next to Alpemix in the list should be checked
Screen Recording : The box next to Alpemix in the list should be checked
After making these settings, the alpemix program should be closed and restarted.