SKD Client ID Not Authorized

Hello
My PDF documents are up on Issuu.com. To put PDF documents on my website would be the ideal method of presentation. These two articles were helpful in understanding how to do this:
https://www.labnol.org/embed-pdf-200208
and
https://medium.com/adobetech/easily-embed-pdf-into-your-website-using-adobe-document-cloud-view-sdk-3a40094f27b6
The second link (medium.com) after clicking on 'get your client id here' took me to the adobe.io authentication page. On that site I was able to collect my Adobe credentials for www.meherbabalibrary.org. (Today I attempted to open that site and was 'denied access'?)
I was then sent via email from Adobe the credenials. However, when I then open the PDF test web page ( http://meherbabalibrary.org/babalist/list_f/dana/list_f_f.html ) - I get this:
" This application domain (http://meherbabalibrary.org) is not authorized to use the provided View SDK Client ID. "
Let me know what mistake I may have made and how to make corrections so that the embedded PDFs becomes viewable.
Thanks!