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.