DIY mode on EARU DIM 63A ewelink energy meter doesn't work


I have DIM EARU circuit breakers (reference EAKCB-EWE-M).

The firmware is 3.5.
No problem connecting to Ewelink via my account.

I can activate DIY mode (2 long presses of 6 seconds) and connect to the ITEAD xxx wifi hotspot (SSID: ITEAD-X ; Password: 12345678).

However, it is not possible to open the web page using the IP address or
The connection appears to be reset by the server.

Do you have any ideas or advice?

Is there a block or user/password specifically for these devices?
Thanks for your help.

only sonoff brand produt suppor DIY mode