Does not create worlds

I was going to play my experimental gameplay world that i have before the update 1.10 and I waited very long and no progress than the loading screen so I deleted the world and I want to make a new one but it turns out I kept pressing "Create" but it doesn't do anything. There are 2 bug reports here, keep it in mind.

Old experimental gameplay worlds can't play/generate

Unable/unresponsive "Create" button.