https://blogs.msdn.microsoft.com/mattm/2012/09/19/ssis-with-alwayson/
https://technet.microsoft.com/en-us/library/ms182754%28v=sql.110%29.aspx
Temporary solution : Alter master key again with service master key
OPEN MASTER KEY DECRYPTION BY PASSWORD = ‘x’ — Should be encrypted! See below
ALTER MASTER KEY ADD ENCRYPTION BY SERVICE MASTER KEY
Here is SQL server 2016 AG setting.
It seems like working with SQL 2014 as well.