WARN [Collector worker thread 2] com.vmware.vr.vrops.VrAdapter.onCollect - Failed to collect data
com.vmware.vim.binding.vmodl.fault.SecurityError: Access to perform the operation was denied.
VMware Aria Operations 8.x
A defect in vCenter that accepts any capitalization of Administrator but only correctly entered Administrator will have permission to generate metrics.
To workaround this issue:
Use capital "Administrator" and not lowercase "administrator" when entering the account details, otherwise it will succeed in testing connection but fail to gather metrics.