Only assets (images, styles, scripts that are not required by the application) should be affected by the custom branding, according to the documentation: - https://www.gluu.org/docs/casa/3.1.6/administration/custom-branding/#external-assets-directory But we're seeing that the links in the left bar are also being affected (and not the links in the content area), therefore making 404 errors when clicked:  - https://idp.example.com/casa/custom/user/otp-detail.zul We've mitigated by adding a redirection in the httpd server to remove the /custom/ part. By the way, the link in the Casa > Custom branding to the docs is broken (points to _/docs/casa/3.1.5/..._). Best regards, Guilherme Capilé