Removing underscore from _hbmCrucible.json makes the game crash on startup

Just tried it with fresh install of 1.7.10 on PrismLauncher with same result.
Attaching the crashlog: https://pastebin.com/72gjWyzN

oop i see the issue

Did you make any changes to the file or did you use the template as-is?

use the template as-is?

Yeah, I tried to use file without modifications to be sure it's not caused by me

Fixed in X4613.