Fatal error: Uncaught WpOrgRequestsExceptionInvalidArgument: WpOrgRequestsCookie::__construct(): Argument #1 ($name) must be of type string, integer given in public_html/staging3/wp-includes/Requests/src/Exception/InvalidArgument.php:29 Stack trace: #0
Now it's getting even stranger. Today morning I tried to login to the backend - again I got the same error.
Then I tried to login with a different account and I worked. Afterwards, it also worked again with my original account.
This needs to be investigated. I'd appreciate it if you could follow the steps mentioned din the hidden message below to copy your website to our server for further investigation: