No idea why. Here's the error:
Error: syntax error
Source File: https://payments.wikimedia.org/index.php?title=-&action=raw&gen=js&useskin=vector&270
Line: 1
Source Code:
<!DOCTYPE html PUBLIC "-W3CDTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
Version: unspecified
Severity: minor