Error "Battery is too low to connect to Wi-Fi" when updating/downloading Spotify music

My Forerunner 255 music asked to update my Spotify playlists, but when I try, I keep getting an error (battery to low ti connect to wifi). I get this message even if my watch is fully charged and plugged-in to the charger. 

I have the last firmware and Garmin connect versions, and I've unsuccessfully tried to:

1. disconnect Spotify from my Garmin and reinstall It

2. Remove the wifi from Garmin connect and add It again

3. Restart my Garmin

4. Delete Data and Reset Settings.

I get the same message errore if I try to Sync wifi from the Wifi menu in Garmin connect, but testing the network connection in the sub-wifi menu "personal networks", I'm able to connect to the wifi 

Any suggestions?