Not sure if this counts as a bug but it has happened twice. Random maps work fine. Entering my own number does not. Will experiment and return.
Using my numpad is what causes the error. Hitting the zero key brings the error up, which shuts the game down.
Hi! Thanks for reporting this!
It seems like one of our debug profiling tools was hotkey mapped to a num pad key and isn’t disabled by default.
For now, please avoid using the num keys to enter in the world seed. I’ll look into disabling the debug stuff.
Woo! I’m helping!