I had the same issue running cloackcoin on Linux machine. Seems like a bug, but i found a workarround.
Follow these steps:
0. backup your wallet (copy file wallet.dat to safe place)!!!
1. Export private key of your wallet (where balance are missing)
2. stop cloakcoin-qt
3. Rename or delete your wallet.dat file
4. start cloakcoin-qt. A new wallet with differrent addresses should be generated.
5. open debugging window console (help > debug window> console)
6 import your key exported in step 1. using command:
importprvivkey <your key exported in step1>for example :
importprvivkey Q5HpHagT65TZzG1PH3CSu63k8DbpvD8s5ip4nEB3kEsreAnchuDf "MYOLDWALLET"7. check your balance