Unable to create new episode

Podlove Publisher
2

You need to find the actual PHP error, then I can help. The one WordPress displays is not helpful.

You can find it in your PHP error logs on your server. If you don’t know how to do that and don’t have an admin to help you out, you can alternatively enable error logging in WordPress.

<?php
# wp-config.php

define( 'WP_DEBUG', true );
define( 'WP_DEBUG_LOG', true );

Then create a new episode (which generates the error). Then the log wp-content/debug.log should be created with the error in it.

See https://wordpress.org/support/article/debugging-in-wordpress/ for details.