A friend of mine is using Podlove Web Player 5 in Wordpress using Bridge Theme. When we are trying to display the player, nothing happens. When we look into the browser console, we can see, that there is a double slash in the URL that leads to the problem:
When we remove the double slash, wp-json delivers the correct answer. We have no idea where the second slash comes from. I disabled all other plugins and even changed to WP default Twenty Twenty theme - with no effect.