I don't get tasks in lab

I’m trying Cybersecurity Fundamentals, 1.2 Skill Check lab and i get no tasks. It’s blank.

I can i pass the skills test without the tasks to perform?

now my linux machine is black. no picture.

I am having issues submit each task that comes with an exercise. It always shows “pls retry and submit”. And even after doing exactly that, it still wont submit my answered task to allow me move to the next topic. What do I do?