Hey @alexandra124, Welcome to the Local Community Forums!
Because the browser is showing a Local-branded 404 page, that means that the Local router is working, it just doesn’t know where to direct requests for your site.
That usually means that there was an error importing the site. You can try importing the site again and see if that works. If there are still issues, then it’s best to take a look in the Local log to see what errors Local is reporting.
If you attache the Local Log, we’ll have a better idea of what’s going on. See this Community Forum post for instructions on how to get that log: