If you provide an MRE, I can take a look.

One possible reason is that you're telling http-xhrio that the response will be in a certain format, but it actually isn't and the library fails to parse it. In any case, the reason should be in the argument to the :on-failure event.

thank you

that was the issue, i found that i had specified json-request-format as the response format

surprised chat-gpt didn't pick that one up

he had nothing but nice things to say