This morning, I tried running my project, and I got bombarded with a bunch of errors saying that some globals were undefined. No matter what I did, nothing fixed it. To make sure I wasn't crazy, I made a fresh new project and didn't alter it at all. Same exact batch of errors.
Hi L & R Buttons, that's very strange, could you maybe try clicking "Build Options" and selecting "Empty Build Cache" from the menu, and trying to build again? I'm wondering if it's compiled a file incorrectly and is stuck using a cached version of that file for some reason.
The other thing you could try is going into your temporary folder (which you can find in the application preferences)
If you open that folder it will contain "_gbsbuild", "_gbstools", and "_gbscache". Try deleting all three of these folders, restarting GB Studio and trying to build again.
Please let me know if either of these methods fix the issue for you as it will help me track down what could have happened to prevent the problem for others in the future.