graphical.target with Nvidia Driver only works in Isolation

Hi,

i followed this tutorial on how to install Nvidia Driver for my Geforce 1050 with Rhel.
https://access.redhat.com/solutions/4134381
When i set-default graphical.target and boot i get a black screen after i login to my account.
When i now set-default multi-user.target, boot and do
systemctl isolate graphical.target
everything works perfectly.
Can someone please help me?

Thanks,
Phil