Which version are you trying to use Windows/Mac/Linux and v1.2.1 or v2.0.0beta? I've sometimes seen issues like this that get fixed on a Mac by installing Apple's command line tools https://www.gbstudio.dev/docs/build/#troubleshooting
Which version are you trying to use Windows/Mac/Linux and v1.2.1 or v2.0.0beta? I've sometimes seen issues like this that get fixed on a Mac by installing Apple's command line tools https://www.gbstudio.dev/docs/build/#troubleshooting