Won't skip to next week

I used WeekPlan last summer with no problem but when I tried to use it this month, it did not let me use the button to skip to the next week. Every time I try, nothing happens. It will change the url to "https://app.weekplan.net/?r=3#view=Week&routeData={"year":2016,"month":3,"day":14}&uiSettings={}" but the screen will remain the same. When I try and skip forward using the calander, it will let me skip two weeks ahead, but not one. I have tried it using both Chrome 48 and Safari 9 and I experience the same problem