Welcome to Apowersoft community. Sorry for the late reply.
You can follow the instructions below to set Windows Firewall when it blocks some functions of ApowerMirror:
On your PC, open “Control Panel” > “System and Security” > “Windows Firewall” > “Allow an app or feature through Windows Firewall”, then you can find ApowerMirror on “Allowed apps and features”. Tick the “Private” and “Public” boxes to allow this app to communicate through Windows Firewall.
For more detailed guide on how to allow/edit the list of Allowed Apps in Windows Firewall, you can refer to this article.
And if you’re a Mac user, you can easily know how to configure Application Firewall from here.