'NoneType' object has no attribute 'lower'

Hi... Since 5 days or something like that, Bitmask is not working for me.

When I try to connect with:

$bitmaskctl vpn start

Sometimes I have this answer:

NoneType' object has no attribute 'lower'

And sometimes this:

status      starting
firewall    on
vpn         starting
domain      riseup.net
remote      None:None
↑↑↑         46.0 B
↓↓↓         24.0 B

I have waited up to 5 minutes or more, and I can't open any website, at least not before I run:

bitmaskctl vpn stop

I did many times the:

$rm ~/.config/leap/

And is still not working.

I'm using Bitmask with Debian testing/unestable and my version is:

bitmask_core: 0.10.7+1.gf0a1e3dd.dirty

Cheers, any help is appreciated