I getting 401 error when using OMDb api how i can resolve this problem

Question

I am new to web development and I am trying to build a chrome extension that displays imdb scores on netflix. I am using the OMDB API to do this. At first I got the following error:

"Mixed Content: The page at '' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint ''. This request has been blocked; the content must be served over HTTPS.",

however I just changed the "http" in the url to "https" and it went away. However, now I am getting a 401 error, which I think means my access is being denied. This is a picture of the full error

Here is the code for the extension

Manifest file: