Cannot reset/start the Lab exam environment

I started my exam for ecppt some days ago.
At some point I set the password for a user within the lab which I probably shouldn’t have done. I also suspected that an exploit could work better if I reset the environment.

I clicked the STOP, and then Reset.
Trying to start the lab environment gives me

It cannot be started. It has been like this for 30 min now.
The countdown clock is unfortunately still ticking for me.
I only have this evening and until noon tomorrow.