FR / 1.20 plugs

The entire installation proceeds correctly from the Tapo application.

Identification in Bluetooth, connection to WiFi 2.4 GHz in WPA2.

The plugs are visible in the Tapo app and can be turned on and off.

However, the following message appears: "This Tapo device can only be controlled locally".

When the plugs are active, the led is solid orange.

They are located 30 cm from the router.

I see the plugs connected to my router, and from the application I see that an IP address is assigned to them.

Of course, I tried to reset the plugs, with a lamp plugged into the plug or not.

I also tried changing the WiFi channel. The DNS has been modified with the value 8.8.8.8, all other devices connected to the router connect correctly to the Internet.

Using a phone as a WiFi access point, I was able to connect the plugs and update the firmware to version 1.4.5 Build 20210122 Rel. 57265

In this configuration, the led remains fixed green.

I assume the problem is with my router, but I don't understand which one.

The firewall is disabled, as well as the WiFi access control.

Which tests could I perform to resolve this?