I have studied Red Hat Openstack documentation on RHOSP8. However, I want to do hands-on labs before taking the exam.
Does anyone know if it is possible to only book an online practice lab instead of spedning the entire amount for the course?
To add to Jayadev's post, I think the v8 of the exam is no longer offered, so you'll need to do v10 or the freshly released v13. (I would go ahead and do v13 if it were me.)
I looked for a support case for your SSO ID, didn't find one. Are you opening support cases using https://access.redhat.com ? If not, that's where you should be opening them for technical support (as is the case with all Red Hat products).
I also looked at your RH124 lab and see that it was running January 1, so the issue is resolved?