I can't change the expiry date on my alias or fix the encryption private key!

[Blocknugget]

Hi, I have been trying to fix my alias and change the expiry date to qualify for the CPS airdrop in a few days. These aliases are attached to my masternode addresses. When I try to change details for my aliases, I notice there is a red exclamation mark next to the 'Encryption Private key (encrypted) field. Hovering the cursor over this returns 'Key cipher invalid'. I can alter this by briefly changing the alias address then returning it to the original default address. A green tick now appears next to the 'Encryption Private key'. When I click 'Update' block market returns the error 'Cannot update alias. TypeError: Cannot read property 'addressKey' of null. Currently this occurs regardless, if I try to change the expiry date or not. Please help or I dont think Ill be getting my CPS tokens. I tried to resolve issue in slack #help but to no avail.