I turned off a timer using the toggle, only to come back and have it back on later. I dismissed that as being tired, and maybe I forgot. I turned the timers back off, did some work, and when I came back to turn them on I got this error (The timmer does not exist).
After getting the error I refreshed the page and all the timers were back on. I had the timer off as the logic wasn’t working, so having them ‘magically’ turned back on isn’t great.