Errors and unavailability to turn on the teach pendant

I hope you can help me to find solution to the following problem.
Today, I tried to turn on my UR5 robot, but without success. I pressed on the power button and the Teach Pendant started loading, but not for long, after couple of seconds, errors showed up and the Teach pendant started shutting down . In the attached screenshots you can see the errors.

I will be very grateful,
if you can tell me what can cause that problem.

Thank you in advance!