Hello @Dormelchen2
A user account with the following vCenter Server permissions is required to configure vCenter Server for the product use data collection.
vCenter Server read-only role
Global.Licenses
Global.Diagnostics
Global.Health
Global.Settings
Kindly validate if the above permissions are granted to the user which is used to register the endpoint.
For more details refer to page 9 of VMware Skyline Collector Installation and Configuration Guide