The discord link doesn't seem to work. The bug is fairly simple however. Clicking save or load doesn't open a window to save or to choose a save.
make sure you are logged into your discord account, otherwise the link will show as not available. This is because discord set the server to be NSFW which prevents public invites link from working if you are not already logged into discord in the same browser
You can also manually enter the invite into your discord, press the + button at the bottom of your server list