Sorry to hear about your issue. I have been able to import your page at no issues.
Of course not all sensors are available at my system:
From a first look at the error log it looks like there is an System.NullReferenceException issue with a LogData Control.
It looks like you use a LogData chart of CaseBottom vs WaterOut.
You can try to remove the element in the XML page file manual and try again. Just delete the complete block.
We will also try to find the bug.