On Service Portal, System downloads CSS file on accessing session-timed out pageIssue On clicking the Login page of Service Portal which is session timed-out, a file present on the CSS Style Sheet gets downloaded automatically. Example: 1) Create a style sheet and link it to CSS Include of the Theme of Service Portal. 2) Now login to the instance. 3) Go to /sp 4) Duplicate the Tab. 5) Logout from the Portal via Profile within Browser Window 1 6) Now, come back to browser window 2 7) Refresh browser window 28) The system will log out so Login again. On trying to log in, the system will download a file. ReleaseAll ReleasesCauseThis is because the syntax in the URL of the CSS Style Sheet is not configured correctly. Example- @font-face {font-family: “Font Awesome 5 Brands";font-style: normal;font-weight: 400;font-display: block;src: URL("./sys_attachment.do?sys_id=SYS_ID");}ResolutionTo resolve the issue replace the URL with the below syntax: "window.location.href='sys_attachment.do?sys_id=SYS_ID'" Example- @font-face {font-family: "Font Awesome 5 Brands";font-style: normal;font-weight: 400;font-display: block;src: URL(window.location.href="./sys_attachment.do?sys_id=SYS_ID");}Related LinksThis solution is valid for Font Awesome version 4 as well.