Dev.. the difficulty is too low, all blocks are being rejected because the bits do not match:

2018-04-06 20:09:18 ERROR: CheckProofOfWork() : hash doesn't match nBits
2018-04-06 20:09:18 ERROR: CheckBlockHeader() : proof of work failed
2018-04-06 20:09:18 ERROR: CheckBlock() : CheckBlockHeader failed
2018-04-06 20:09:18 ERROR: ProcessNewBlock : CheckBlock FAILED for block 6d51f1ee8205cc6eb845a983dc9aefe4857276a0ce0b13753f2dbeb91399809f

At least that's what I make of it.
Anybody any tips?