Update config.json

config.json

@@ -1,6 +1,6 @@
 {
   "_class_name": "DiffDiffBlocks",
   "auto_map": {
-    "ModularPipelineMixin": "block.DiffDiffBlocks"
+    "ModularPipelineBlocks": "block.DiffDiffBlocks"
   }
 }