Power Apps failed to upload files to SharePoint. Error message: Siteurl cannot be null or empty. Please ensure valid SharePoint site is configured or contact your administrator.

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Power Apps failed to upload files to SharePoint. Error message: Siteurl cannot be null or empty. Please ensure valid SharePoint site is configured or contact your administrator.

Yake Liu 25

Hi,

We have been experiencing a file uploading issue for two weeks and it started suddenly. I am from a local team that use power apps product. I am not working in the Admin centre in our organisation.

We have a Power Apps and allows users to upload file in the attachment tab. This file uploading function keep popping up error message when users upload files: 'Siteurl cannot be null or empty. Please ensure valid SharePoint site is configured or contact your administrator.' The users sometimes can upload successfully (rarely) and this success seems doesn't depends on specific user or specific time or specific changes we made to fix it. Thus, the problem seems to be intermittent. However, the issue happens to all the users except for me. I can always upoad files successfully. Given that my access includes system customiser, which is more than the other users. I am not very sure if this is the reason. But we are unable to give all the users access of system customiser.

Me and our Power Platform Admin centre has discussed this issue. From the information the Admin centre provided, when a user upload files, there is a folder created automatically in SharePoint side and the files are saved in the folder. The Admin centre has checked that the folders are created successfully everytime when the users try to upload files. But still we got the error mentioned above. Our Admin centre suspect it's an intergation problem between Power Apps and SharePoint, but they have no clue how to resolve it.

I have attached the error message and when the error happen to this post. Has anyone come across this issue or experienced something similar? I’d really appreciate any suggestions or assistance. 2025-11-07 10_15_36-Early Terminations Requests_ Information _Power Apps — Mozilla Fire.png

2025-11-07 10_44_14-Chat _ Microsoft Teams.png

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3 additional answers

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Answer 1

AlexDN 7,430 Microsoft External Staff Moderator

Dear @Yake Liu,

Thank you for posting your question in the Microsoft Q&A forum. 
I understand that You have a Power Apps solution that lets users upload files to SharePoint via the Attachments/Documents tab. For the past two weeks, most users see the error “Siteurl cannot be null or empty” when uploading files, while you (with System Customizer access) can upload successfully every time.

To better assistance, could you please provide following information:

Are you using a model-driven app with the Documents tab or a canvas app with the Attachments control?
What is the configuration method for SharePoint integration, through Document Management Settings or a custom connector?
Does the issue affect all entities/tables or only one?
What security roles do the affected users have, and what role do you have?
What changes (if any) were recently made to SharePoint site URLs, document libraries, or Power Apps customizations?
What happens when users try to upload directly in SharePoint? can they upload files without issues?
What environment is this running in? Production, Sandbox, or a Trial environment?
What browser or client are users using when the error occurs?
What is the pattern of failure? Does it happen on all records or only certain records?

In the meantime, I recommend some steps below

Validate SharePoint Sites configuration
- In Document Management Settings, select your SharePoint site and click Validate to ensure the URL is correct.
Check user privileges
- Ensure affected users have Read and Append To permissions on:
- SharePoint Site
- SharePoint Document Location
Inspect Document Location records
- Confirm fields like absoluteurl and sitecollectionid are not null. If they are, recreate or correct them via the Document Management wizard.
Verify SharePoint access
- Users must have permission to the target SharePoint library/folder.

Please understand that our initial response does not always resolve the issue immediately. However, with your help and more detailed information, we can work together to find a solution.

Your detailed response will help us diagnose and investigate the issue more efficiently. If I misunderstood what you’re looking for, feel free to let me know or share a screenshot. I’d be happy to help further!

Thank you for your cooperation.

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AlexDN 7,430 Reputation points Microsoft External Staff Moderator

2025-11-09T07:10:27.36+00:00

Dear @Yake Liu,
If you still have further concerns, please feel free to let us know.
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Yake Liu 25 Reputation points

2025-11-10T05:20:33.5833333+00:00
Hi AlexDN,

Thanks for your response. Here are some more information:

• Are you using a model-driven app with the Documents tab or a canvas app with the Attachments control? Model-driven app.

• What is the configuration method for SharePoint integration — through Document Management Settings or a custom connector? Through Document Management Settings.

• Does the issue affect all entities/tables or only one? At this stage, we’ve primarily observed the issue in the file uploading function of the app (on the “Attachment” tab). We haven’t noticed any issues with other entities or app functions. The table involved is the one used for submitting applications (the “Early Termination Requests” table).

• What security roles do the affected users have, and what role do you have? Other users typically have either their own business group’s access or a combination of their business group access plus division admin access. I have the division admin roles plus the System Customizer role. I’m the only one who can upload files consistently without encountering the error.

• What changes (if any) were recently made to SharePoint site URLs, document libraries, or Power Apps customizations? No changes were made before the issue started, including access settings. After the issue occurred, I tried the following troubleshooting steps:

Navigated to Advanced Settings → Document Management → Document Management Settings

Selected the SharePoint site (URL validated successfully)

Changed the folder structure options to test different configurations (“Not based on entity,” “Based on entity: Contact,” “Based on entity: Account”)

Clicked Next and Finish after each test

These steps didn’t resolve the issue.

• What happens when users try to upload directly in SharePoint? Can they upload files without issues? Users and I don’t have direct access to the SharePoint site, so we haven’t been able to test direct uploads. However, through the app, I can upload files successfully, which indicates my uploads are still reaching SharePoint correctly.

• What environment is this running in? Production, Sandbox, or Trial? Production environment.

• What browser or client are users using when the error occurs? Primarily Firefox and Google Chrome.

• What is the pattern of failure? Does it happen on all records or only certain records? The issue appears intermittently. The app allows users to submit an application record and upload multiple files. We’ve noticed that if I (as System Customizer) upload one file first, other users can then upload additional files successfully for that same record. Apart from this scenario, users rarely succeed — most upload attempts fail with the same “Siteurl cannot be null or empty” error.

Cheers
Kai-Ex 645 Reputation points Microsoft External Staff Moderator

2025-11-11T06:58:42.1+00:00
Dear @Yake Liu,

Please refer this and update security roles for affected users.

Source: Permissions required for document management tasks

After that, please test with a normal user on a new record:

Before you upload, let the user try first.

If upload works, the fix is confirmed.

If it still not works, please consider creating a support ticket. Microsoft’s support team will need to step in. A technical support engineer can perform a remote session to investigate the situation verify the backend configurations and run any necessary synchronization tools to resolve the problem. If the issue requires further attention, they can escalate it to a specialized team for deeper analysis.

Here’s what your Office 365 Global Admin should do next:   

Submit a Service Request: The Global Admin should create a service request with Microsoft support to get advanced technical assistance and diagnostics. For detailed instructions on how to get support, please refer to Get support - Microsoft 365 admin.   

Find Your Microsoft 365 Admin: If you’re unsure who the Global Admin is within your organization, you can find guidance on locating them here: How do I find my Microsoft 365 admin? - Microsoft Support.  

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AlexDN 7,430 Reputation points Microsoft External Staff Moderator

2025-11-13T07:45:48.0266667+00:00

Dear @Yake Liu,
It has been a while, and I am writing to see how things are going with this issue. Have you had a chance to check the replies which @Kai-Ex provided? Any update would be appreciated.

Answer 2

Yake Liu 25

Placeholder

Answer 3

Yake Liu 25

Hi @AlexDN and @Kai-Ex ,

Thanks for your responses and support. I was tied up with other tasks over the past few days.

I’ve confirmed that the permissions are configured correctly. I also discovered something that may be useful for you to understand: users are able to upload files successfully the day after their initial failed attempts on the same application record. I’m not sure about the exact minimum timing of waiting, but for example, a user who couldn’t upload at around 5 PM yesterday was able to upload the file successfully at 10 AM this morning.

Appreciate your help again! Have a lovely day.

Many thanks,

Yake

AlexDN 7,430 Reputation points Microsoft External Staff Moderator

2025-11-19T06:47:53.2333333+00:00

Dear @Yake Liu,
Thank you for updating. Due to it still don't work well and smoothly, I recommend you ask your admin create support ticket to escalate it to the support team, they have full resource, which can help you find the problem faster.
If there's anything you'd like to share or if further assistance is needed, We're here to help. Your feedback is important, and I want to make sure nothing is left unattended.

If you see any replies bring helpful information, please kindly accept it as an answer and vote it up by your original account which raised this question. Once marked, it will automatically pin to top. As other users will also search information in this community, your valuable marked answer will definitely also help other users who have similar queries easily to find the correct channel and useful information more quickly.

Looking forward to hearing from you.

Answer 4

Alexander Kuppek 1

Any solution for the issue as I'm experiencing similar issues recently?

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Power Apps failed to upload files to SharePoint. Error message: Siteurl cannot be null or empty. Please ensure valid SharePoint site is configured or contact your administrator.

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