Auth forbidden when trying to publish a feed

[roughnecks]

Hello, got this issue while running the software.
I'm on Debian stable, Prosody 13.0.1

  File "/home/user/atomtopubsub/publishx.py", line 64, in create
    node_exist = await self.plugin['xep_0060'].get_node_config(server, node)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
slixmpp.exceptions.IqError: <iq type="error" from="pubsub.domain.tld" to="user@domain.tld/pubsub" id="7787b93853d542fda8ee475"><error type="auth"><forbidden xmlns="urn:ietf:params:xml:ns:xmpp-stanzas" /></error></iq>

I'm not sure why it's forbidden. Prosody's config for pubsub:

Component "pubsub.domain.tld" "pubsub"

  add_permissions = {
      ["prosody:registered"] = { "pubsub:create-node" }
  }

Obviously the user in atomtopubsub config has the "registered" role and I believe e.g. my Movim instance's users can publish right away on the same component.