Why can't I check a task for completion?
I have a task which has three sub-tasks, and each sub-task also has a couple of items to do. I checked each items for a sub-task completion, and checked each sub-task for completion. Everything is fine. And then I wanted to check the whole task for completion, but it just kept loading something and never ended. Even after I re-started the todoist, the same thing happened and the task still can't be checked. Anyone had this problem before? I used the firefox browser in a XP system.