Minecraft mod crashes when i try to launch it in vscode

[BjornSteinar]

I just added an item to the mod and there are no problems shown in vscode but when i try to launch minecraft it just crashes and i cant find the problem
crash-2022-01-29_20.33.53-client.txt
:

[Juuxel]

The problem is that Identifiers can only contain lowercase characters (together with numbers and _.-) and you're trying to use uppercase ones:

Non [a-z0-9_.-] character in namespace of location: EggertSteinarVignisson:test

[BjornSteinar]

thank you it works now