"Server Error: 'Sequence contains more than one element' on Homepage."

[CodeBreaker1011]

Steps to Reproduce:

Navigate to http://eaapp.somee.com/

This error occurs even before user interaction or before reading my code

Expected Result: The website should load the homepage without any errors.

Actual Result: The website displays a "Server Error in '/' Application..." page.

Evidence:

I believe this error is on the server side, not from my code.