SharePoint list attachment upload error: 'Upload is invalid'

Question

I have people that keep getting an error when trying to upload attachments on a list item. I checked the permissions for the list and there's no restrictions for their uploads. The files they are uploading aren't too big. There isn't a specific file type issue.

It will take them 4 tries to get it to save any of the attachments, they just disappear after they go back in to check. It typically takes them 3-4 times of checking to ensure docs are uploaded.

This is what the error says:

Note: I've replaced the actual file names with placeholders

Error: Encountering issue when uploading attachment Example.pdf : Upload is invalid. Encountering issue when uploading attachment Example.pdf : Upload is invalid. Encountering issue when uploading attachment Example.pdf : Upload is invalid. Encountering issue when uploading attachment Example.pdf : Upload is invalid. Encountering issue when uploading attachment Example.pdf : Upload is invalid. Encountering issue when uploading attachment Example.pdf : Upload is invalid.

Answer 1

Hi STolliver, based on my understanding of the issue, I tested locally and there was no problem with PDF files, but similar problems were generated for .docx files.

According to the information HRESULT: 0x8007000D, we infer that the problem stems from some problems on the server side when reading the local file.

Here are some ways that currently work in my environment for your reference.

1. Save the file as a new file.
2. Save the file to a new address.

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