NullPointException

[cunning oracle]

Okay

[bleak pasture]

henlo

[cunning oracle]

Send the class that uses your ConfigManager

[bleak pasture]

uh just tell me which part you need

i don't want to share the whole thing

[cunning oracle]

Material mat = Material.matchMaterial(cfgn.getMaterialsConfig().getString(name + "ConfigEnabled"));

[languid isle]

public goes brrr

[cunning oracle]

But the entire thing

[bleak pasture]

it's a method for making an item with another method

[cunning oracle]

Yes but the variable cfgn is null

And since it’s presumably a field

[bleak pasture]

private static ConfigManager cfgn;

[cunning oracle]

Sending the class is appropriate

You have to send the entire class, that will not do

[edgy iron]

Chances are either you're not setting it or the value you're setting it to is null

which one exactly, well we don't have enough code to figure out