"Invalid animated QRCode fragment" connecting BlueWallet to Electrum server

[ildella]

1. Go on Connect Bluewallet /connect/bluewallet
2. Scan and Save the QR Code under Network > Lightning Settings --> ok
3. Scan QR Code under Network > Electrum Server --> fails with:

Invalid animated QRCode fragment. 
Please Try again

OK    OK

I've tried from 2 different Android devices with the same results.
The node is in sync since > 24 hours.
Finally, OK OK is not a typo here, the dialogue actually has 2 OK buttons.