If the user you are using for the DAC does not have the default database set to master, the SQL query "SELECT substring(crypt_property,9,len(crypt_property)-8) FROM sys.key_encryptions WHERE key_id=102 and (thumbprint=0x03 or thumbprint=0x0300000001)" returns empty resultset.
Please add catalog name to the from clause: ...FROM master.sys.key_encryptions ...
If the user you are using for the DAC does not have the default database set to master, the SQL query "SELECT substring(crypt_property,9,len(crypt_property)-8) FROM sys.key_encryptions WHERE key_id=102 and (thumbprint=0x03 or thumbprint=0x0300000001)" returns empty resultset.
Please add catalog name to the from clause: ...FROM master.sys.key_encryptions ...