error: cannot find symbol issue

So, I'm making a mod which adds characters from a specific game for 1.16.5, but when i compile the mod it throws me lots of errors like

error: cannot file symbol
    texWidth = 16;
    ^

I am using a custom model made in blockbench using the Mojimaps exporter
when using the premade models it works normally

Here's the workspace: https://mega.nz/file/zDgHVawK#C-EoWFCuxLO7WQDzM0h5CxA5fsJqqh63ZSDSNSWu548