Network settings: Error 500

Hi everyone
I am desperately trying to configure the wifi IP address to static on my Raspberry pi 4.
For that, I tried the new function:
System / Host / Network settings (see image below).


When I run the backup I get an error:
Failed to change network settings
500 Internal Server Error Server got itself in trouble

Some information about my configuration:
Home Assistant 2021.1.3
Core Version: core-2021.1.3
Supervisor Version: supervisor-2021.01.4
Host Operating System Raspbian GNU / Linux 10 (buster)
Docker version: 20.10.2

Thank you for your help !