error An unexpected error occurred: "EPERM: operation not permitted,

How do you solve the error? After stopping the server, the error still appears

EPERM is a permissions error. Maybe you need to be root user or change file permissions. Hard to say with such limited information.

Thank in advance for your information, so I'm not the root user, is there a way to solve this error?

What are you doing?

I have tried running the terminal using administrator rights as shown in https://stackoverflow.com/questions/64603970/an-unexpected-error-occurred-eperm-operation-not-permitted-in-yarn