What's wrong with this Google Places (radar search) request? -

What's wrong with this Google Places (radar search) request? -

i'm trying list of 200 gyms in washington, d. c. within radius of 50000 meters.

for purpose, issue next request google places api (radar search):

https://maps.googleapis.com/maps/api/place/radarsearch/json?key=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx&location=38.895111,-77.036667&radius=50000.000000&sensor=false&type=gym

i error message:

{ "html_attributions" : [], "results" : [], "status" : "invalid_request" }

what wrong request?

change type=gym types=gym, worked me

google-maps google-places-api google-places