Failing to connect to AIX on PAM 2.8.3

Document ID : KB000103371
Last Modified Date : 26/06/2018
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Customer upgraded AIX to 7.2
PAM is also upgraded to 2.8.3

They are having issues in verifying and changing password for accounts that requires the follow settings. (Change on Behalf with Update/Verify Credentials Script enabled)

From the tomlogs (7.2AIX), it shows this error message 
WARNING: **** ACCOUNT VERIFICATION FAILED: targetAccount ID: 1125' due to 'Error Code: 15212
PAM 2.8.3 (upgraded from PAM 2.6.x)
AIX 7.2
Secure connection could not be established from PAM to AIX, as a result the password verification could not be performed.

Caused by: com.jcraft.jsch.JSchException:
Algorithm negotiation fail at com.jcraft.jsch.Session.receive_kexinit(
at com.jcraft.jsch.Session.connect(
at com.jcraft.jsch.Session.connect(
at com.cloakware.cspm.server.plugin.SSHConnector.connect(

The issue is resolved after applying PAM