@Fr33: it has come to our attention that firmware 2.1.0 has a bug that causes the program data output to be incomplete when the number of programs is a multiple of 3. This will lead to the web interface not responding. If your number of programs is 3, 6, 9 etc. it’s very likely that the issue you encountered is due to this bug. A fix has been released in firmware 2.1.2. You can check the related thread here:
https://opensprinkler.com/forums/topic/creating-a-third-program-stops-ui-access/#post-35016
Thanks.