PDF embed API troubles

I have the code for the PDF embed correct.  I hosted raw PDF renders and when I plug in the embeded software it initially renders and then stops.  Copilot and Grok tell me that Adobe is blocking the rendering, which is what it looks like to me.  I have tried to delete to the credential in order to generate it anew for the url (maybe using the *.domain.org wildcard format, instead of using the www.domain.org format).  Right now it is not letting me delete the credential as it says things are connected (maybe it will take hours or a day to process that there are not any more locations of the api).