Firmware 2.1.1 has a known bug, which causes the web interface to lose response if the number of programs is 3, 6, or any multiples of 3. So the first question is: do you know how many programs you have added? If it’s a multiple of 3, I suggest that you upgrade to the latest firmware 2.1.2. Alternatively, if you don’t want to upgrade firmware yet, the workaround is to add an additional program and disable it. Let me know if this solves the problem.