Hi ​@Monica Rodriguez  Welcome to Box Community! I’d be glad to assist regarding shared link.

The error, “This shared file or folder has been removed or is unavailable to you.” is typically caused by one of 3 things:

1. Incorrect sharing permissions on the shared file. In other words, whoever created the link did not set the correct access level on the link. If your co-worker is not yet a collaborator in the folder (or file) the link points to, the link would need to be set to “people in the company” (i.e. if that person is also at your company) or “people with the link” (i.e. if that person is not part of your company).
2. The person who created the shared link has since removed it (though may not be applicable on your current case).
3. The user is attempting to access the shared file with a personal Box account instead of the account with which the file was shared.

Here's what you can do:

1. Verify that your co-worker is logging into Box with the account to which the file was shared. Typically this will be the recipient’s company Box account.
2. If that doesn't resolve the issue, the file or folder owner needs to review and revise the share permisions or to send the user the correct link to the file.
3. If still doesn't resolve the issue, please contact your organization's IT admin for help locating the file and fixing the permissions.
4. If the permissions and location of the file are verified and correct, and the user still cannot access it, please contact our Box Support for assistance by visiting support.box.com.

➡ For reference, please check out this article regarding Shared Links FAQs.
 

Hoping to have this resolved soon!