Emails are not enabled on this instance so PeerTube won't be able to send an email to <x id="START_EMPHASISED_TEXT" ctype="x-em" equiv-text="<em>"/><x id="INTERPOLATION" equiv-text="{{ registration.email }}"/><x id="CLOSE_EMPHASISED_TEXT" ctype="x-em" equiv-text="</em>"/> explaining its registration request has been rejected.
Put your instance on the public PeerTube index: <x id="START_LINK" ctype="x-a" equiv-text="<a href="https://instances.joinpeertube.org/instances">"/>https://instances.joinpeertube.org/instances<x id="CLOSE_LINK" ctype="x-a" equiv-text="</a>"/>