That's great news. Once I saw those errors in your log I knew exactly what the problem was, it was trying to add up the total watering time for zones that were disabled and dying - and once that happens the rest of the routines fail (like showing watering times). I have already started working on a patch to resolve that problem so you can return to having the zones disabled but at least for now there is a nice big band-aid on it to make it work.
Hopefully have that patch out in a day or two.