Login Trouble

I think this is my fault. I was getting an error
“Unable to create directory /var/www/vhosts/domain.com/httpdocs/wp-content/uploads/2008/05. Is its parent directory writable by the server?”

and one of the suggestions on the forum to fix this error was
Go to General Settings and in WordPress address URL field leave: https://yoursite.com. This one is wrong: https://www.yoursite.com.

So I removed the www just to give it a try. WordPress promptly brought me back to the login screen and it won’t let me log back in. It doesn’t give an error message or wrong password or anything. once I type in the password it just goes right back to login.

I do have access to the ftp. Does anyone know how I can fix this and regain access to my site?