I created my test project yesterday. I code on it and when I finish coding, I paste to my main project. But today my project can’t be reached. If I type its URL (*.glitch.me), it says there is no project with that name. If I type its edit URL (glitch.com/edit/#!/*), it says “We’re sorry, something went wrong! Please try again, or try refreshing the editor.”.
There may be a paste issue. Are you sure the main and other file was compatible?