When trying to use the Aria Operations plugin in vCenter, you only see the following error:
401 Unauthorized Error: Unable to authorize VMware Aria Operations/vCenter Server API with provided credentials
Aria Operations 8.18.x
In the vCenter adapter integration in Aria Operations UI, there is a "/" towards the end of the vCenter Server URL or IP address.
In Aria Operations UI:
See the following KBs related to the same error, but different causes:
Error "401 Unauthorized Error" is seen while accessing Aria Operations Plugin in vCenter