Graphql Endpoint got this "details": "Cannot invoke \"Object.getClass()\" because \"value\" is null" error | Community
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Fendy_
Level 2
May 22, 2025
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Graphql Endpoint got this "details": "Cannot invoke \"Object.getClass()\" because \"value\" is null" error

  • May 22, 2025
  • 4 replies
  • 974 views

I have created a GraphQL endpoint on the author instance, and it works fine there. I’ve also published the GraphQL endpoint and the content fragment to the AEM publish instance. But when I try to access the GraphQL endpoint on the publish instance, I see the following errors. I already confirm that the endpoint is already published

AEM Version - AEM CLOUD

{
"errors": [
{
"errorType": "ServletError",
"message": "Internal Servlet Failure",
"details": "Cannot invoke \"Object.getClass()\" because \"value\" is null"
}
]
}

This is the error. 
Is there a clue where I need to check this ?

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    Best answer by PRATHYUSHA_VP

    Hi @fendy_ 

     

    Verify all the references in content fragment model and publish all CF models and authored fragments.

    As you already mentioned endpoint is published, please verify if endpoint is accessible in publish instance. 

     

    Hope this helps

     

     

    4 replies

    Asheesh_Pandey
    Community Advisor
    Asheesh_PandeyCommunity Advisor
    Community Advisor
    May 22, 2025

    Moving to AEM community for review.

    - Asheesh
      Aditya_Chabuku
      Community Advisor
      Aditya_ChabukuCommunity Advisor
      Community Advisor
      May 22, 2025

      Hi @fendy_ ,

       

      As a General precaution, try

      1. Re-Publishing CF Model, Content Fragment even though they were published already. 
      2. Review logs via the Cloud Manager > Developer Console > Logs (Publish).
      3. Refer this page -thttps://experienceleague.adobe.com/en/docs/experience-manager-cloud-service/content/headless/graphql-api/graphql-endpoint#publishing-graphql-endpoint 
      4. Go to https://<publish-url>/content/graphql/global/endpoint-name.graphql  and check if it was published and not returning 404 error.
      Thanks,Aditya Chabuku
        PRATHYUSHA_VP
        Community Advisor
        PRATHYUSHA_VPCommunity AdvisorAccepted solution
        Community Advisor
        May 23, 2025

        Hi @fendy_ 

         

        Verify all the references in content fragment model and publish all CF models and authored fragments.

        As you already mentioned endpoint is published, please verify if endpoint is accessible in publish instance. 

         

        Hope this helps

         

         

          EstebanBustamante
          Community Advisor and Adobe Champion
          EstebanBustamanteCommunity Advisor and Adobe Champion
          Community Advisor and Adobe Champion
          May 23, 2025

          Hi, 

          Chances are a Content Fragment Model is missing on the Publisher, which is why it’s returning null—it just can’t find the object. Make sure all the necessary models and their references are published. You can double-check this using the Repository Browser. https://experienceleague.adobe.com/en/docs/experience-manager-cloud-service/content/implementing/developer-tools/repository-browser

           

          Hope this helps

          Esteban Bustamante
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