Forge 1.21.1 mod not working due to Invalid bare key: '${mod_id}' when working on custom entity

[zencat]

I've been working on Minecraft Forge 1.21 Modding, (I'm a bit inexperienced), and when trying to create my own custom throwable projectile entity, I come across this error I can't seem to fix. The console reads that my "mod not working due to Invalid bare key: '${mod_id}'  ".
Does anyone know why this is happening? The Pastebin link for all the relevant files is https://pastebin.com/h3UaNYwn. Any help would be greatly appreciated. Thanks.

[TileEntity]

And the mods.toml?

 

Instead of using 

modId="${mod_id}"

try 

modId="wackyweapons"

[zencat]

Even though I defined this in my gradle.properties, it still gives me the same error, even when I change it in my mods.toml, where:
 

Exception in thread "main" java.lang.reflect.InvocationTargetException

...

Caused by: com.electronwill.nightconfig.core.io.ParsingException: Invalid bare key: '${mod_id}'
 

And my mods.toml worked fine before that

[TileEntity]

Hm, I have no idea

I have no idea which program you use, but in the console, try

grep -r "\${mod_id}" src/main/resources

to find the usages of this key

[zencat]

I use eclipse on windows, but when I use the search tool, it only comes up in mods.toml (I changed it back when it didn't work), and pack.mcmeta

[TileEntity]

Then it is some kind of issue beyond my programming experience - I have no idea