I checked your license and it activated our tester.
None of the things you mentioned should have any bearing on our license server and its authentication process.
The only thing you can check is that the automatic access point in WiFi/LAN does not block the internet access.
Please try the following:
Make sure your Max2Play device is connected to the internet.
Delete the license in the Max2Play interface and click „save“ with a blank field.
Click on „Settings/Reboot“ again, reenter your license and click „save“.
Check if the green „Activated“ field appears. If not, contact us again for further help.