this error message comes when you try to send an update-time, that is higher than the interval from now to your last update time.
For example, you click "Update uptime" without using my program. What happens then?
lets say you have an uptime of 1 Hour on March 9th, 9am
then, four hours later, at 1pm you try to update your faked uptime with for example 7 years
the systems knows, that you had an uptime of 1 hour just 4 hours ago, so you can't have an uptime of 7 years now because the intervall doesn't fit.
So, unfortunately, you can ony use my tool with a new created account