Why did OneDrive File convert (preview) stop working in Power Automate?

Question

My flow was working fine yesterday and even this morning, then it just... stopped. It's giving me this error message:

Conversion of this file to PDF is not supported. (Sandbox_HtmlTransform_InvalidOperation / An exception occurred while executing within the Sandbox)

Is there some sort of limit on how many you can convert? Nothing has changed in the flow that I am aware of.

Answer 1

I know this is a couple of years later, but note that "preview" actions are not for production use, and can be removed by Microsoft at any time.

Answer 2

Hi @John Wellmeier

Welcome to Q&A forum ~

But according to your decription, this issue is more related to flow, please check whether the known issues and limitations is helpful.
Such as the maximum archive size for Extract archive to folder action is 50 MB and 100 files inside.

To help you better, it's recommended to post a new thread on Microsoft Power Automate community. Thanks for your understandings.

Besides, I find 2 similar threads, you can have a look.
Convert to PDF Not Working
400 Error Conversion to PDF not supported

---

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

---