ProQuest have shared the following message:
We are experiencing a technical issue with user navigating to a book's URL who authenticate using an SSO service. You may receive the following message:
"Sorry, your institution does not allow access to ProQuest Ebook Central from your current IP address. Please contact your librarian."
Our technical team is working to have this fixed and we expect to resolve this issue soon.
In the meantime, please delete existing cookies from your browser or try using a different browser in order to restore access.
Please accept our apologies for any inconvenience caused.
This message also appears as a pop-up note when accessing an e-book.