I had Processmaker 2.5 working fine on a server when connecting via http (http://mysite). Then I requested our server admin to install SSL certificates to secure the server. He then configured the network such that the server is accessed behind the company's reverse proxy i.e. (https://mysite). When I try to access it, it loads the login page in a plain background. I enter the correct credentials then after clicking the login button, the URL changes to "https://mysite/sys/en/neoclassic/login/ptyjuJ%C2%B0anZ4"(refer to the screen shot).
Any pointers on where/ what I need to check to get it back working.