How to fix 0x80040154 error when register sync root?

Question

Cannot register sync root folder using winrt::StorageProviderSyncRootManager::Register in windows 10.

Get error 0x80040154 (Class Not Registered)

How to fix it??

Answer 1

Hello there,

Error 0x80040154 (Class Not Registered) usually occurs when there is an issue with the registration of a COM (Component Object Model) class. In the context of winrt::StorageProviderSyncRootManager::Register, it means that the necessary COM class or component required for registering the sync root folder is not correctly registered on the system.

To fix this error, you can try the following steps:

Check Dependencies: Make sure that all the dependencies required for registering the sync root folder are installed and correctly registered on the system. This may involve checking if you have the necessary libraries and components installed, or if any specific software or runtime is required.

Repair the Windows Installation: It's possible that some system files or components required for COM registration have become corrupted. You can try repairing your Windows installation to restore the necessary components.

Run as Administrator: Ensure that the application or script you are using to register the sync root folder is running with administrative privileges. Right-click on the application or script and select "Run as administrator."

64-bit vs. 32-bit: Check if there is a mismatch between the architecture of your application and the registered COM component. If you have a 64-bit application, make sure that the COM component is also 64-bit and vice versa.

Reinstall Application: If the application or library that is attempting to register the sync root folder is a third-party software, try reinstalling the application. During the installation process, it should correctly register any necessary COM components.

Check the Registry: Manually check the Windows registry to ensure that the required COM class is properly registered. However, exercise caution when modifying the registry and consider creating a backup before making any changes.

Recompile or Rebuild: If you are building your application from source, ensure that you are using the correct SDKs and dependencies, and try recompiling or rebuilding the application.

Windows Updates: Ensure that your system has all the latest Windows updates installed. Sometimes, Microsoft releases updates that fix issues related to COM registration.

If you are still unable to resolve the error after trying the above steps, it might be helpful to consult the documentation of winrt::StorageProviderSyncRootManager::Register or seek assistance from the Windows development community or Microsoft support channels. They might have more specific information about this error and how to address it in the context of your application.

I used AI provided by ChatGPT to formulate part of this response. I have verified that the information is accurate before sharing it with you.

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