Invalid Request error was encountered while trying to process the request:
%R
Some possible problems are:
Missing or unknown request method.
Missing URL.
Missing HTTP Identifier (HTTP/1.0).
Request is too large.
Content-Length missing for POST or PUT requests.
Illegal character in hostname; underscores are not allowed.
HTTP/1.1
Expect:
feature is being asked from an HTTP/1.0 software.
Your cache administrator is %w.