Is the site no longer in your Local app at all? Or it’s showing in your Local app but it just won’t open and gives you a 502 error?
If it’s not showing in the app at all, you should be able to track down your Local Sites folder on your machine and re-import the site back into the app. It’s possible an update may have shifted some files or directories somewhere.
The error in your logs indicates that Local can’t find that file/folder for some reason. Are you able to locate the actual site folder or files in your machine by searching to see if they shifted in path or to another drive?