Error message:
"The following error has occurred: An error occurred while installing extensibility feature with error message: AppContainer Creation Failed with error message NONE, state This implementation is not part of the Windows Platform FIPS validated cryptographic algorithms.."
The following may be in place when experiencing this issue:
How to check FIPS mode and toggle it:
For SEPM: Enabling or disabling the FIPS mode for the Symantec Endpoint Protection Manager
At OS level: System cryptography: Use FIPS compliant algorithms for encryption, hashing, and signing