You had a site (Site 243801) since March 9, 2025.
Yesterday when you made fresh install, instead of linking it to existing site, you created a new site (Site 256011).
As a result your Pi is now feeding data to new site 256011 and the old site 243801 statistics show no date being fed to it
OLD SITE 243801
NEW SITE 256011
To getback your old site, follow this “How To”
For Beginners - How to Get Back Existing Station Number in A Fresh Install