Cannot post faster than five minutes with internal server error no error message

Expected behavior

I would expect to be able to post or get an error message why not.

Actual behavior

I am getting an internal server error.
{"message":"Internal Server Error","stack":{}}

How to reproduce

It seems to happen when you post faster than five minutes

• Browser: chromium 57
• Operating system: Debian GNU/Linux Sid

Recording Of The Bug