If I wand to start 1.14.3 I get a crash what is saying 'The game crashed whilst rendering overlay Error: n: Non [a-z0-9/._-] character in path of location: minecraft:blocks/special/Goldhero SKIN'

Put the summary of the bug you're having here

What I expected to happen was...:
that that game started

What actually happened was...:
the game crashed while it was starting

Steps to Reproduce:
1. start up the louncher
2. start the game
3. when it is starting the crash comes