While accessing JasperSoft UI (i.e. http://Jasper_Server:8080/jasperserver-pro/login.html) with IE 11, the page is shown in plain HTML
JasperSoft 7.x
IE 11 Web Browser
All Supported Windows Operating Systems
Based on the Tibco JasperSoft 7.1 documentation, IE11 is indeed certified and compatible:
Please ensure the following within IE:
1. The JasperSoft URL has been added to the IE Trusted Sites
2. The JasperSoft URL has been added to the Compatibility View and the option 'display intranet site in compatibility view' is selected