Domain key error for quic cloud

I get the following error when trying to get the domain key for QUIC.cloud:
There was a problem with retrieving your Domain Key. Please click the Waiting for Approval button to retry.

There are two reasons why we might not be able to communicate with your domain::

1) The POST callback to https://mydomainname/wp-json/litespeed/v1/token failed.

2) Our Current Online Server IPs was not allowlisted.

My hosting provider said there’s no block on QUIC cloud IPs and they can’t even see any request being made to the file /wp-json/litespeed/v1/token in their logs at all, failed or otherwise

The page I need help with: [log in to see the link]