Has Anyone managed to get Delegated RPKI working with ARIN

Hi Nanog, Posting here since my Google-fu is coming up short.  I'm trying to setup delegated RPKI in ARIN using rpki.net's rpkid Python daemon and am running into an issue submitting the identity file to ARIN's control panel. The same file submitted to RIPE's  test environment at https://localcert.ripe.net/#/rpki works without issue, while submitting to ARIN results in "Invalid Identity.xml file." The guide I'm following is this one: https://github.com/dragonresearch/rpki.net/blob/master/doc/quickstart/xenial... and I'm able to get as far as generating the identity file. Wondering if anyone has gone down this road before and has any helpful hints to make this work? Cheers, Chris