On 05/28/2022, a change was made to enable strict checking of OAuth 2.0 redirect URLs, but we were not notified of the change in advance.
https://ja.developer.box.com/changelog/#2022-05-18-oauth-20-redirect-url-release
Four emails have been sent in the past few months to companies that were using applications that were not compliant with this standard, explaining how to update their applications.
Can you tell us why you did not receive a change notice?