Hi,
There was a correction made to the web site.
The command you should be using to allow profiling tools access to the GPU performance counters should be
modprobe nvidia NVreg_RestrictProfilingToAdminUsers=0
This should resolve your issue.
For persistence across reboots, we’d recommend adding this to a /etc/modprobe.d config file as mentioned on
https://developer.nvidia.com/ERR_NVGPUCTRPERM
Sorry for the misinformation.