Access Denied message improvement

Hello team,
Is there a way to improve the "Access Denied" message shown to users who do not have access, by providing clear contact information for support?
For example, a user receives a link from a colleague, but it doesn't work. The user then struggles to find out whom to contact, especially if the colleague also doesn't know.
Currently, the message only advises the user to check if they are signed in with the correct account or to contact the project administrator — but it doesn't specify who that is.
Improving this message with a direct contact (e.g., key user, support team, or distribution list) could help reduce confusion and support requests.