I'm trying to find a different way to test my game without having to publish it then go to the site then play my game its not like it's a hassle for me to do so but I just want to know if there is a easier way to do what I need to do because I know doing Play Solo isn't the equivalent...
Next to "Play Solo" you should see "Start Server" And starting a server is basically playing your game but in studio, you can see both Client and Server-sided errors. So "Start Server" will fill your needs.
Edit: As said in a comment by BlueTaselm, you can't use BadgeAwarding, PlayerPoints, DataStore etc