Hello Constantin,
I’m Frometa79. My plugin was working fine. I try to add a 30 Seconds timing for the Automatic Import, (How often should YouTube be queried for playlist updates.) somehow the plugin stop working complete, I remove the code I add to your plugin, and still not working. (I Upgrade the plugin also, and still not working).
The issue is this: The Automatic Import usually show a red text saying: Is not showing up the yellow box that say: Next automatic update scheduled in 5:12.
Last updated playlist second.
Already existing videos will not be imported twice.
The plugin is not showing me that information any more.
I did some test with the plugin in a WordPress for test and works fine.
I need your help to fix this. I sent you my WP access from your support form at Codecanyon.
Please have a look at my Plugin.