If you want to know exactly what the issue is, you can run the script in Verbose Mode. To do this, open a new terminal window by pressing Command + N.

Drag the macOS Creator.command file into the terminal window.

Add the verbose argument (-v) and then press the (return) key.

Follow the same steps to create the drive, except in Verbose Mode the script will output all of the commands used, along with error information, drive details, etc.

Follow these same steps, except add (-s) instead to run the script in Safe Mode, which will disable all checks and run the commands even if they could fail.