My iMac error and restart every day

Startup in Safe Mode and see if you still have panics (that last one you posted isn’t a panic).

How to use safe mode on your Mac - Apple Support

If it doesn’t, you likely have some third-party system modification installed.

If it still panics, take it to an Apple Store Genius Bar or Authorized Repair Center for evaluation.

Use the Support page to set up an appointment.

The signature looks like a RAM or other memory error.

You can check it with Use Apple Diagnostics to test your Mac - Apple Support

I instal only NordVPN,

That's too bad. Are you sure they aren't selling all of your information in one complete block since you tunnel all of your internet usage through them?

I have no idea how NordVPN works as I would never install it on my Mac, but it could be using a Kernel Extension. Third party kernel extensions are one of the most common causes of kernel panics.

When I used safe mode everythink is soo slow. Can't work in safe mode.

You're not supposed to work in Safe Mode. It's a troubleshooting step. If it doesn't panic, then it is quite likely that a kernel extension is the cause.