HTTP Error: 403 Client Error: Forbidden for url

[vicru]

Hi,
after obtaining API Keys following steps 1 to 6 from the specific Tutorial, and running python code on a Jupiter notebook just as described in steps 1 to 6 from this github github, I The following error on the Jupiter notebook:

HTTP Error: 403 Client Error: Forbidden for url: https://www.googleapis.com/youtube/v3/search?part=snippet&type=video&maxResults=50&order=date&key=AIzaSyAeQv2hbTDAWDVeoo_dJmMMrk-woNBmSMo&q=social%20justice%7Csjw&publishedAfter=2018-03-01T00:00:00Z&publishedBefore=2018-03-31T23:59:00Z&verbose=1&pageToken=CKwCEAA

Right before that error pops up, the Jupiter notebook shows a pink line that looks as follows:

I thought my problem might be that I exceeded my daily quota, but I'm afraid that is not the cause because I obtained the same result after I created two new projects in the same day and one more new project that they after (apparently quotas are set to zero/new every day). I believe my problem might lie in the I followed the wrong instructions to generate API keys. My goal was to replicate that whole Jupiter notebook that I linked above. I would appreciate any help in this respect.