I have followed all of the set up steps, and read multiple troubleshooting steps. Once adding my API key, and search engine ID everything works. But when attempt to search it fails! Let me know of any tips you have!
I'm so sorry for the late answer. Have you activated the GoogleCustomSearch from the Google API Console?
Use the search field to look for Custom Search, click on the result and then click the button to enable the API.
Let me know if that works.