Unable to create bootstrap

I’m trying to generate bootstrap to connect rhel8 server to SUSE manager through CLI and WebUI, when i try through cli, it give me no product available.
suse-manager:~ # mgr-create-bootstrap-repo rhel8-x86_64
No products available
suse-manager:~ #

and through WebUI, it failed

how i can fix that to create bootstarp

Which version of SUSE Manager are you using, perhaps with SUSE Multi-Linux Support?

Have you added the RHEL8 software channels?

What do you see if you run mgr-create-bootstrap-repo without specifying rhel8-x86_64?

also give me no product available

suse-manager:~ # mgr-create-bootstrap-repo
No products available
suse-manager:~ #

So have you added the RHEL8 software channels?