ResourceLocation cannot be converted to String

Hi there !

I'm working on some blocks detector mod.

I have one error on my procedure but I can't relly figure out the problem:

Fabric Loom: 1.0.18
Not publishing sources jar as it was not found. Use java.withSourcesJar() to fix.
> Task :compileJava
C:\Users\olivier\MCreatorWorkspaces\ore_detector\src\main\java\net\mcreator\oredetector\procedures\OREDETECTORRIGHTCLICKEDONBLOCKProcedure.java:71: error: incompatible types: ResourceLocation cannot be converted to String
        && (world.getBlockState(new BlockPos(x, posY, z))).is(BlockTags.create(new ResourceLocation(((namespace + ":" + "ores_coal")).toLowerCase(java.util.Locale.ENGLISH))))) {

Can someone help me with this one ? Thanks in advance