@Axicee It looks like your Controller Version doesn't support setting a channel range for the AP (only setting one specific channel for the radio). You will need to update the controller version to...

What is Interference Detection? Intereference detection is a feature that helps identify and analyze sources of Wi-Fi interference within your network environment. By scanning the surrounding...

@Sapphire-One Unfortunately, it does not appear Essentials is available in your region just yet. Please check the newsletter for any updates on if that changes. TP-Link News - Press Releases -...

@AliReza_A Have you fully updated the firmware across your routers and switches? Also, if you can share your network topology, that would be great.

@RemyH If the device is still under warranty, you can get replacement antennas through the support email. Please contact the support for your region here.

@BernWood Can you connect the laptop directly to the Bridge AP's ethernet ports to check, rather than through the passive PoE adapter? Alternatively, can you connect to the PoE adapter directly...