Do you mean this window?
I have no problem clicking on the elements. Tested with DDEV, Chrome and Firefox, TYPO3 13.4.4. Do you use the latest TYPO3 version?
Can you check the browser console for JavaScript or other errors?
By the way: this wizard is just a graphical interface. You can always edit the form yaml files manually. But of course that’s much more work and prone to errors.