Docs ERROR (Emergency)

My App/Pages Support link:
Learn how to create one:

Describe the bug:
Hi, I created app with 10+ users. They upload documents and make revision for them. Some documents started to give error when you try to open them.

Expected Behaviour:
Normally, anyone with this link can open this document but google docs says access denied. how can i solve it?

How to replicate:
Describe in detail how to recreate the issue

You can create one using

there a a lot of links some them opening some of them gives error. How can I solve it.

Might be worth submitting a support ticket.