500 Internal Server Error on viewing Commit details

I keep getting 500 Internal Server Error messages when trying to view commit info for commits in the Wiki history.

Page tells me to give you this c21073b91ad144b39c0e4804d4f25e19

For those of you with permission to view private wiki commits, heres ONE of the URLs causing an issue: https://bitbucket.org/jduncanator/sh-it-v2/wiki/commits/c42c705f566433396e73ab7146eb0658ed5f32e3