title: PostgreSQL 13.3 Logical Replication doesn't create the replication slot in the master
body: <p>I'm new in PostgreSQL. I'm trying to create a <strong>logical replication</strong> of 2 databases that are in the same localhost and port (I don't know if that's part of the problem that I'm having). The point is, that I create the publication with no problem, but, the moment that I create the subscription, the replication slot that must be created in the master won't create. I have the <code>wal_level = logical</code>, but I don't know if I need another configuration in the <code>postgres.conf</code>  or <code>pg_hba</code></p>
  <p>Another detail is that I can't create the subscription by code, Postgres just simply doesn't respond, like it got stuck right there, doesn't show any error message or confirmation. The only way I can create the subscription is in pgAdmin 4, but here occurs the error that the replication slot it doesn't create.</p>
  <p>Any suggestion of help is accepted. And btw, sorry if my english is kind of bad, I hope I have explained myself.</p>