And I just talked to the vendor, they said the error. Which they have never seen before says. "No issuer found"

I did create an account online, I do have funds available and I did reach out sat on hold 21 minutes young lady said that not all vendors accept temporary cards...

I received mine this morning and everything I have tried to use it for has been declined. Didn't really come with any instructions. Do I use it like a gift card...