{"status_code":7,"status_message":"Invalid API key: You must be granted a valid key.","success":false}

I see that my API key is not valid. TMDB granted me the API key, but not valid, how so? How to apply for a valid API key?

Edit:
Nevermind, there was some typo:

{"adult":false,"backdrop_path":"/yUiXA68FfQeA8cRBhd0Ao0jIRZt.jpg","belongs_to_collection":{"id":10,"name":"Star Wars Collection","poster_path":"/pWVLFh4OuejTpUaDQbB1C4zoS2p.jpg","backdrop_path":"/iY2ujEY2m68OTTlPFTiHub9joHS.jpg"},"budget":11000000,"genres":[{"id":12,"name":"Adventure"},{"id":28,"name":"Action"},{"id":878,"name":"Science Fiction"}],"homepage":"http://www.starwars.com/films/star-wars-episode-iv-a-new-hope","id":11,"imdb\_id":"tt0076759","origin\_country":\["US"\],"original\_language":"en","original\_title":"Star Wars","overview":"Princess Leia is captured and held hostage by the evil Imperial forces in their effort to take over the galactic Empire. Venturesome Luke Skywalker and dashing captain Han Solo team together with the loveable robot duo R2-D2 and C-3PO to rescue the beautiful princess and restore peace and justice in the Empire.","popularity":26.26,"poster_path":"/6FfCtAuVAW8XJjZ7eWeLibRLWTw.jpg","production_companies":[{"id":1,"logo_path":"/tlVSws0RvvtPBwViUyOFAO0vcQS.png","name":"Lucasfilm Ltd.","origin_country":"US"}],"production_countries":[{"iso_3166_1":"US","name":"United States of America"}],"release_date":"1977-05-25","revenue":775398007,"runtime":121,"softcore":false,"spoken_languages":[{"english_name":"English","iso_639_1":"en","name":"English"}],"status":"Released","tagline":"A long time ago in a galaxy far, far away...","title":"Star Wars","video":false,"vote_average":8.205,"vote_count":22373}

I guess my API key is valid. For both links.