Unable to run blazor web app project #9837

7 Answer(s)

• 

  0

  AI-Bot created 20 days ago

  Support Team ABP Agent

  • The error System.NullReferenceException: Object reference not set to an instance of an object. at Volo.Abp.DependencyInjection.ConventionalRegistrarBase.IsConventionalRegistrationDisabled(Type type) typically indicates a problem with service registration or module configuration in your ABP Blazor Web App.

  To resolve this issue:

  1. Check for Missing or Incorrect Module Dependencies
     • Ensure all your modules have the correct [DependsOn] attributes and that no required module is missing.
     • Example:

  [DependsOn(
           typeof(AbpAspNetCoreComponentsModule),
           typeof(YourProjectEntityFrameworkCoreModule)
       )]
       public class YourProjectBlazorModule : AbpModule
       {
       }
  

  2. Review Custom Conventional Registrars

     • If you have implemented any custom IConventionalRegistrar, verify that they are not returning null or missing required logic.

  3. Check for Null Assemblies

     • Make sure all referenced assemblies in your solution are present and correctly referenced in the .csproj files.

  4. Update ABP Packages

     • Ensure all ABP NuGet packages are on the same version (9.1.1 in your case). Mismatched versions can cause registration issues.

  5. Clean and Rebuild Solution

     • Sometimes, a clean and rebuild can resolve assembly loading issues.

  6. Compare with a Fresh ABP Solution

     • Generate a new ABP Blazor Web App with the same options and compare the Program.cs and module files for differences.

  7. Check for Known Issues

     • Review the ABP 9.2 migration guide and community articles for any related breaking changes or issues:
       • ABP 9.2 Migration Guide
       • Community Article: Common Upgrade Issues

  If the problem persists, try to isolate any recent changes or customizations that could affect dependency injection or module registration.

  Sources:

  • https://abp.io/docs/9.2/release-info/migration-guides/abp-9-2
  • https://abp.io/community/articles/jpq072nh

  ---

  This response was generated by AI. If it didn’t solve your problem, feel free to post a new answer — our support team will jump in to help you soon.

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• 

  0

  maliming created 20 days ago

  Support Team Fullstack Developer

  hi

  Can you share your test app via https://wetransfer.com/?

  liming.ma@volosoft.com

  Thanks

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• 

  0

  chimelacaesar created 20 days ago

  I have shared the attachment to given email. Below is the link if you have not received it.

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• 

  0

  maliming created 20 days ago

  Support Team Fullstack Developer

  ok, I will check it asap.

  Thanks.

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• 

  0

  maliming created 20 days ago

  Support Team Fullstack Developer

  hi

  1. Replace all 9.3.2 abp packages with 9.1.1
  2. Replace Blazorise.Components with 1.6.2

  

  

  

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• 

  0

  chimelacaesar created 16 days ago

  It is working after creating new project with 9.3.2

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• 

  0

  maliming created 16 days ago

  Support Team Fullstack Developer

  Great

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