All the links to the solutions do not work

I tried to check the challenges and/or solutions from the main page but wasn't able to open the links, e.g. http://nbviewer.ipython.org/github/donnemartin/interactive-coding-challenges/blob/master/arrays_strings/rotation/rotation_solution.ipynb

ERR_TOO_MANY_REDIRECTS - nbviewer.ipython.org redirected you too many times.

Start from the repository's main page and inspect the challenge and solution links, reproducing the example URL in the issue. Done means the affected links open their intended notebooks without an ERR_TOO_MANY_REDIRECTS error.

Written by the indexing model from the issue text.