Exam environment troubles

Hello, everyone!
I tried to take the CKA exam and failed.
I think there was a problem with the environment. When I tried to update a node or restart a faulty node I got an error like “Unable to read /proc/cpuinfo transport not connected” and similar for /proc/meminfo. I haven’t encountered such errors before and I didn’t get them in KodeKloud courses.
Has anyone encountered such errors? How to deal with them? Is this a normal behavior or is it abnormal?
Thank you for the answers.

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