dev should keep an eye on current network issue
mining is not possible, the change of MN-payment has lead to some trouble on block 83699.
currently the are no valid masternodes available to create the next block
from wallet-log:
2018-03-07 08:01:55 CreateNewBlock: Failed to detect masternode to pay
One of the pools has broken through to block 83700, just a matter of waiting for it to propagate around the network!