Looks like OTG allows characters for the world name which cannot be used in windows folder names which causes CTD on world creation.

Normally, Minecraft will substitute invalid symbols with an underscore in the file name to prevent this crash. OTG does not do this, causing the crash.

For v9.0_r8, only "^[()a-zA-Z0-9 _-]+$" are allowed, continue button is unavailable until name complies.