It may appear that the container only shows the line debug file located at xxx. In that case it tries to connect to the database which it cannot reach. Especially in the SQLite database type this can cause trouble. So you need to create a Linux user with id 1000 and chown the db and podcasts dir to that user.
2. Podcasts cannot be written to disk
This also means your permissions are wrong. Please take a look at #1 of this FAQ