This is a Windows issue rather than an AppGameKit Studio problem. You can check and add rules to the Windows Firewall by doing the following - or at least this is how I can do it with my Windows 10:
+ Click the Windows "Start" button.
+ Type "
Firewall" and click on the suggested "
Windows Defender Firewall with Advanced Security" application.
+ Check your "
Inbound" and "
Outbound" rules list. You might find it easier to order the list by "Name". AppGameKit Studio seems to appear as "ide" for me but if you find something which looks like it could be AppGameKit Studio, double click on it and you can choose the "Programs and Services" tab to check which executable it is referring to. For me (non-steam user), it is:
"C:\program files (x86)\the game creators\appgamekit studio\ide.exe"
You can also add new rules in there for specific programs.