[1.16.4] Data Generator won't find resources folder

I'm using Data Generators to generate the models and block states files, however, when I run runData, it errors with IllegalArgumentException, "Texture effetewood:block/effete_planks does not exist in any know resource pack". Even tho there's a png with the correct name in the textures/block folder.

this is the registerStatesAndModel:

@Override
    protected void registerStatesAndModels() {

        ResourceLocation name = ModBlocks.EFFETE_PLANKS.get().getRegistryName();
        Main.LOGGER.info(name.getNamespace() + ":" + ModelProvider.BLOCK_FOLDER + "/" + name.getPath());

        simpleBlock(ModBlocks.EFFETE_PLANKS.get());

        logBlock(ModBlocks.EFFETE_STEM.get());
        logBlock(ModBlocks.STRIPPED_EFFETE_STEM.get());
    }

and this is the data section in the build.gradle:

data {
  workingDirectory project.file('run')

    // Recommended logging data for a userdev environment
    property 'forge.logging.markers', 'SCAN,REGISTRIES,REGISTRYDUMP'

    // Recommended logging level for the console
    property 'forge.logging.console.level', 'debug'

    // Specify the modid for data generation, where to output the resulting resource, and where to look for existing resources.
    args '--mod', 'effetewood', '--all',
      '--existing', file('src/main/resources/').toString(),
      '--existing', file('src/generated/resources/').toString(),
      '--output', file('src/generated/resources/')

    mods {
      effetewood {
      	source sourceSets.main
      }
    }
}