Hi

Can you try to download wallet and block chain from:
http://deutercoin.uk/?page_id=194
or
https://github.com/servc4/DeuterCoin/releases/download/1.0.8/DeuterCoin-Linux-GUI.tar.gz
https://github.com/servc4/DeuterCoin/releases/download/1.0.8/DeuterCoin.BlockChain.29.03.2018.rar

Delete all from .deuter folder ( don't forget to backup your wallet )
Run downloaded wallet for a minute and close, replace files from DeuterCoin.BlockChain.29.03.2018.rar and run again...

Should work, if not then can you send me your log files on discord please...

Regards
ServC4
Dev Team