my wallet got stucked 1 hour behind. and the message "No block source available..." appears. what should i do?
Be patient. ANOTHER high difficulty mining block (42621 with base dfficulty of 5995) is holding things up now that we are at the mercy of profit-seeking, difficulty-averting miners at granatgas-pool,

Just give it time.
I've been looking into the DGW versions and looking at the code to see if there is a solution for the "high hashrate multipool insertion for low difficulty blocks with retreat for high difficulty blocks" that is possible. Looks like profit-seeking miners are staying ahead of the protective difficulty algos that are used to prevent just what they are causing. They directly cause a situation (increasing difficulty) but don't want to hang around for the effects of what they cause, only to come back when difficulty low (and block rewards higher). That's why DGW is on v3. We need a balance on this DGW difficulty roller coaster. :\
Truckman!!!!
Regards,
c_p