Shelly 2.5 shutter not works (cannot GET /roller/0?go=to_pos&roller_pos=0)
I have one Shelly 2.5 that refuse to work :

```
0|homebrid | [6/13/2020, 6:37:58 PM] [Shelly] Error: cannot GET /roller/0?go=to_pos&roller_pos=0 (400) (device SHSW-25 68C63AFB0EFE, at xxx.xxx.xxx.xxx)
```

How can I debug this ? All the other Shelly 2.5 that I use as shutter work as expected 