Encryption Key not Registering

Which IIQ version are you inquiring about?

8.1p4

I have added a new key to the iiq keystore and verified the passwords within SailPoint correspond with the key entriy. Ex: All my passwords start with 3: and that is the key I recently added.
All services have been restarted and I still get the below error:

[ InvalidConfigurationException ] [ Possible suggestions ] Ensure that the IQService version matches the IdentityIQ server version, including the patch version. [ Error details ] Given final block not properly padded. Such issues can arise if a bad key is used during decryption.

I did verify that the IQService is on the same version of the IIQ version.

@Alyson_Trad Check if you followed the steps as per doc

Using the IdentityIQ Keystore - Compass (sailpoint.com)

Check some thread

Nullpointer Exception Met While Encrypted Data Synchronization Task Was Running - IdentityIQ (IIQ) / IIQ Discussion and Questions - SailPoint Developer Community