AP AC LR "No devices found"

I use the UniFi Controller (5.5.20) with Windows 10. If I deactivate the Windows firewall the AP is found.

Is there a how-to, how the Windows firewall must be configured.

As Router I use an ER-X (UBNT Discovery is deactivated). The AP is connected on eth4 PoE passthrough.

Thanks in advance!