It's not working for me. Tried several times with different data, including the tiny example below which did work about a week ago.
I do have the site code running on a local linux machine so no rush to fix your fantastic site!
the url when it failed with the table below:
The error message:
Your session has expired. Please run the function finder again.
0 0.97
1000 1
2000 1
3000 0.95
5000 0.82
10000 0.53
15000 0.36