Machine Learning Classifier Error Performing Document Classification Service Exception 406: InvalidApiVersion

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How to resolve Machine Learning Classifier Error performing document classification Service Exception 406: InvalidApiVersion?

Issue Description: This error typically occurs when using a Machine Learning Extractor model inside the classification activity.

Resolution:

  • Select / use a Classification skill and not an Extractor skill.

Learn more about the differences between the Machine Learning Classifier & Machine Learning Extractor


Next Steps:

If the issue still occurs post confirming the correct Endpoint/Skill being used for the Machine Learning Classifier, share the following information with UiPath Product Support for further investigation,

  1. S​​hare the project files in a zipped folder (XAML, project.json, etc). If unable to share the project, share a screenshot of the Configure Classifiers page in the project.
  2. What version of the UiPath.IntelligentOCR.Activities package is being used? Share a screenshot of the project's dependencies if the full project cannot be provided?
  3. Specifically, what Endpoints/Skills have been tried that are causing the "Invalid response: content=Service Exception 406: InvalidApiVersion Error"
  4. If possible, share an example document that the issue is occurring with.