Me too with do457 labs.
It's huge issue for me, because I've no other time for study , and the exam is in this Thursday (I can't postpone it because I need to complete two more exams before the subscription expires).
@cschunke can you escalate this critical issue ASAP please?
The same is happening to me in Italy. The outage started approx 6 hours ago, I tried to create the DO288-4.6 lab env but it started a never ending creation process. Two support tickets submitted and only auto reply mail received. Last week end i was compelled to postpone the EX288 on next monday morning due to a problem on onboarding check using the iso I successfully used since last September 2021. Obviously the problem wasn't related to my iso USB.
The reason in that situation was the unavailability of RH onboarding server during the whole Sunday 3 april and on Monday moring the RH support explained to me (only two hours before the planned exam starting time) the error in screenshot was "due to temporary glitch and it will be rectified. I would suggest you to try after 4 hrs. If still issue persist, You can download the previous version ISO from link below and try login."
But ... in weekends the contingencies are very frequent and the support will occur, very probably, on next early Monday morning. So, to summarize, the exam training plan close exam date often becomes a real challenge ...