Royalty Free Images

Hello. When inserting images from the Media library I would like to use the searching Royalty free images function from your plugin. I inserted Pexels and Pixabay API, and also ticked the Google API option in the settings. However, via Google I don't get any search results. The same is true for Pixabay. From Unsplash I get only one result and from Pexels 8 images max., not more. Am I doing something wrong? Thank you. Radan