@MaxDen You can set several VLAN Interfaces for different SSIDs, and you can choose the specific VLAN Interface when you set the VPN, check this:

@FrankieP Have you tried uninstall the controller and install it again to test？ Remember to backup the files befor you try it.

@PiterKRA The controller has released V5.8 firmware version, suggest you can upgrade to it. Many bugs have been fixed in the iterations of the release.

@tik6 I'm afraid it can not do that yet.

@mwo This may be related to the controller's reporting mechanism and your client's reporting mechanism. Can you confirm that all 12 of your devices are transmitting data all the time? Are there any...

@ttmobil If you connect to EAP's WiFi, can the clients get internet? How did you connect the EAP to your router? Did you connect them with the cable？ Try to reset the EAP and set it up again.