I am listing the steps you need to double check since the error say MMS authentication failed. User: susov@proxyTest. MMS authentication error sometimes happen when you are passing wrong credentials.
- When you are creating the new security profile delete fields present in authorization, authentication and attribution tabs. After that add this security in SCC>domain>default>security.
- When you are creating an application template in SCC use this security instead of admin.
Midhun VP