The game crashed whilst rendering overlay Error: n: Non [a-z0-9/._-] character in path of location: minecraft:items/BillboardStand2

The game crashed whilst rendering overlay
Error: n: Non [a-z0-9/._-] character in path of location: minecraft:items/BillboardStand2

Have been getting this issue since 1.14 updated. Minecraft crashes before startup- the Mojang and the red loading bar appear, but when the bar gets to about 80% across the game crashes, sends back to launcher with this error message.

Cannot find any reference to "billboardstand2" anywhere online. Any help would be appreciated