Problem: The encrypt wallet feature is disabled on cryptocurrencies that use zero knowledge proofs. 

Solution: Until zk-snark technology matures, wallet encryption remains disabled due to its interference with z_addresses. There are workarounds such as using Third-party Veracrypt or other encryption software to keep your wallet.dat files safe. 

Z-cash statement regarding problems with encrypting wallets with zk-snarks enabled : 

Original post regarding the issue:

If you face any issues, please create a support ticket. Join us on Komodo Discord to talk to our community.