This should fix #4327.

6b6bed18 · Ilya Portnov · 5be561b9 · 6b6bed18
--- a/utils/manifolds.py
+++ b/utils/manifolds.py
@@ -116,7 +116,7 @@ def nearest_point_on_curve(src_points, curve, samples=10, precise=True, method='
            us_out.append(us[i])
            nearest_out.append(tuple(nearest))

-        return us_out, nearest_out
+        return us_out, np.array(nearest_out)

    def goal(t):
        dv = curve.evaluate(t) - np.array(src_point)