Error occurs when retrieving timeline for this question

Question

Here is the question:
https://meta.stackoverflow.com/questions/51812/the-api-sandbox

Here is the API URL:
http://api.meta.stackoverflow.com/1.1/questions/51812/timeline?pagesize=100?page=2

Here is the error:

code: 500
message: "A generic error has occurred on the server; developers have been notified."

Answer 1

That URL is malformed in a particular way that ASP.NET treats specially (as if it were an attack).

/1.1/questions/51812/timeline?pagesize=100?page=2
should be
/1.1/questions/51812/timeline?pagesize=100&page=2