Thanks for reaching out to the Community, Eviloculus.

I would love to help you, but I need some information about your concern. Could you please provide more details regarding the attachment you've accessed? Which transaction did you attach?

Any additional info or a screenshot of the interface will be greatly appreciated. We are looking forward to your reply. Have a good one!

I'm having the same issue.

I go to Sales then Customers, I search for the company and the choose Edit.  I have attached the document (pdf) in numerous ways and it looks good.  I save and exit.  When I go back into the company to ensure the attachment is there and attempt to open that document, I get the exact same error as Maybelle.

The pdf uploaded is a signed contract.

Welcome to the Community, @pam-infuzarchite.

I can see a duplicate post for this exact query you posted. My colleague has already answered similar question you've posted. You can view her answer through this thread: Document Error Response.

Don't hesitate to keep in touch if you need anything else in accessing attachments. As always, the Community is always here to attend to your concerns.