Per the log:
"To install a managed client, the administrator must create a managed client installation package and then deploy the package. To create and deploy a package, use the Client Installation Wizard in the Symantec Endpoint Protection Manager. The Symantec Endpoint Protection Client installation will be cancelled.
MSI (c) (48:EC) [08:01:04:637]: Product: Symantec Endpoint Protection Client -- To install a managed client, the administrator must create a managed client installation package and then deploy the package. To create and deploy a package, use the Client Installation Wizard in the Symantec Endpoint Protection Manager. The Symantec Endpoint Protection Client installation will be cancelled."
Did you try to create an install package and run locally to see what happens? Cleanwipe should've remove this, are you sure it's the latest for 12.1.5? If not, it will fail to remove SEP.