Edd Turtle

I asked Heroku Support about this issue, thought I'd share their reply here in case anyone's in the same boat > The data team has actually been working to make...

I'm getting this error too, have tried running `composer dump-autoload` but hasn't helped. Had a look through the code and couldn't see the issue. Also using version `0.4.9`.

I appreciate this might not be that useful, but I think the issue lies in `nose.py` inside function `verify_challenge()`. The math `sqrt()` function only takes in 2 variables, residuals and...

Based on the info here: https://stackoverflow.com/a/26438018/402585 It does seem to work if you change the code in `nose.py` verify_challenge() to: ``` _, residuals, _, _, _ = np.polyfit(nose_trajectory_x, nose_trajectory_y, 2,...