Can not import java entity model

Hello. So last week i could perfectly add Java entity models to my mod (from Blockbench); but now it does not longer work.

I don't get why. Inside the file the name is correctly added; but when i import it to Mcreator (2020.2) it just shows me this:

''Your model name is not a valid Java name!

Custom mob model names can not contain whitespace.''

But when i look up to the model:

// Made with Blockbench 3.5.0
// Exported for Minecraft version 1.12
// Paste this class into your mod and generate all required imports

public class blue_blaze extends ModelBase {
    private final ModelRenderer upperBodyParts0;
    private final ModelRenderer upperBodyParts1;
    private final ModelRenderer upperBodyParts2;
    private final ModelRenderer upperBodyParts3;
    private final ModelRenderer upperBodyParts4;
    private final ModelRenderer upperBodyParts5;
    private final ModelRenderer upperBodyParts6;
    private final ModelRenderer upperBodyParts7;
    private final ModelRenderer upperBodyParts8;
    private final ModelRenderer upperBodyParts9;
    private final ModelRenderer upperBodyParts10;
    private final ModelRenderer upperBodyParts11;
    private final ModelRenderer head;

    public blue_blaze() {
        textureWidth = 64;
        textureHeight = 26;

        upperBodyParts0 = new ModelRenderer(this);
        upperBodyParts0.setRotationPoint(0.0F, 0.0F, 0.0F);
        upperBodyParts0.cubeList.add(new ModelBox(upperBodyParts0, 0, 16, -2.0F, 0.0F, 0.0F, 2, 8, 2, 0.0F, true));

        upperBodyParts1 = new ModelRenderer(this);
        upperBodyParts1.setRotationPoint(0.0F, 0.0F, 0.0F);
        upperBodyParts1.cubeList.add(new ModelBox(upperBodyParts1, 0, 16, -2.0F, 0.0F, 0.0F, 2, 8, 2, 0.0F, true));

        upperBodyParts2 = new ModelRenderer(this);
        upperBodyParts2.setRotationPoint(0.0F, 0.0F, 0.0F);
        upperBodyParts2.cubeList.add(new ModelBox(upperBodyParts2, 0, 16, -2.0F, 0.0F, 0.0F, 2, 8, 2, 0.0F, true));

        upperBodyParts3 = new ModelRenderer(this);
        upperBodyParts3.setRotationPoint(0.0F, 0.0F, 0.0F);
        upperBodyParts3.cubeList.add(new ModelBox(upperBodyParts3, 0, 16, -2.0F, 0.0F, 0.0F, 2, 8, 2, 0.0F, true));

        upperBodyParts4 = new ModelRenderer(this);
        upperBodyParts4.setRotationPoint(0.0F, 0.0F, 0.0F);
        upperBodyParts4.cubeList.add(new ModelBox(upperBodyParts4, 0, 16, -2.0F, 0.0F, 0.0F, 2, 8, 2, 0.0F, true));

        upperBodyParts5 = new ModelRenderer(this);
        upperBodyParts5.setRotationPoint(0.0F, 0.0F, 0.0F);
        upperBodyParts5.cubeList.add(new ModelBox(upperBodyParts5, 0, 16, -2.0F, 0.0F, 0.0F, 2, 8, 2, 0.0F, true));

        upperBodyParts6 = new ModelRenderer(this);
        upperBodyParts6.setRotationPoint(0.0F, 0.0F, 0.0F);
        upperBodyParts6.cubeList.add(new ModelBox(upperBodyParts6, 0, 16, -2.0F, 0.0F, 0.0F, 2, 8, 2, 0.0F, true));

        upperBodyParts7 = new ModelRenderer(this);
        upperBodyParts7.setRotationPoint(0.0F, 0.0F, 0.0F);
        upperBodyParts7.cubeList.add(new ModelBox(upperBodyParts7, 0, 16, -2.0F, 0.0F, 0.0F, 2, 8, 2, 0.0F, true));

        upperBodyParts8 = new ModelRenderer(this);
        upperBodyParts8.setRotationPoint(0.0F, 0.0F, 0.0F);
        upperBodyParts8.cubeList.add(new ModelBox(upperBodyParts8, 0, 16, -2.0F, 0.0F, 0.0F, 2, 8, 2, 0.0F, true));

        upperBodyParts9 = new ModelRenderer(this);
        upperBodyParts9.setRotationPoint(0.0F, 0.0F, 0.0F);
        upperBodyParts9.cubeList.add(new ModelBox(upperBodyParts9, 0, 16, -2.0F, 0.0F, 0.0F, 2, 8, 2, 0.0F, true));

        upperBodyParts10 = new ModelRenderer(this);
        upperBodyParts10.setRotationPoint(0.0F, 0.0F, 0.0F);
        upperBodyParts10.cubeList.add(new ModelBox(upperBodyParts10, 0, 16, -2.0F, 0.0F, 0.0F, 2, 8, 2, 0.0F, true));

        upperBodyParts11 = new ModelRenderer(this);
        upperBodyParts11.setRotationPoint(0.0F, 0.0F, 0.0F);
        upperBodyParts11.cubeList.add(new ModelBox(upperBodyParts11, 0, 16, -2.0F, 0.0F, 0.0F, 2, 8, 2, 0.0F, true));

        head = new ModelRenderer(this);
        head.setRotationPoint(0.0F, 0.0F, 0.0F);
        head.cubeList.add(new ModelBox(head, 0, 0, -4.0F, -4.0F, -4.0F, 8, 8, 8, 0.0F, true));
    }

    @Override
    public void render(Entity entity, float f, float f1, float f2, float f3, float f4, float f5) {
        upperBodyParts0.render(f5);
        upperBodyParts1.render(f5);
        upperBodyParts2.render(f5);
        upperBodyParts3.render(f5);
        upperBodyParts4.render(f5);
        upperBodyParts5.render(f5);
        upperBodyParts6.render(f5);
        upperBodyParts7.render(f5);
        upperBodyParts8.render(f5);
        upperBodyParts9.render(f5);
        upperBodyParts10.render(f5);
        upperBodyParts11.render(f5);
        head.render(f5);
    }

    public void setRotationAngle(ModelRenderer modelRenderer, float x, float y, float z) {
        modelRenderer.rotateAngleX = x;
        modelRenderer.rotateAngleY = y;
        modelRenderer.rotateAngleZ = z;
    }
}