Very off-topic, but I've seen this twice this week already: it's free rein (as in horses), not free reign [1].
[1] https://english.stackexchange.com/questions/15276/is-this-us...
[1] https://english.stackexchange.com/questions/15276/is-this-us...
https://blog.oxforddictionaries.com/2012/03/26/rein-or-reign...
But still understandable with the kind of context - "take the reins" and "take the reigns" would be imply "take control", no? (Sure, it's clunky, but that's English for you.)