YouTube API daily quota reached. A quota is the daily request budget YouTube gives this app. That budget has been used up for now, so requests can fail until it resets. Resets at midnight Pacific Time (PT), in --:--:--. This limit is set by YouTube and is outside my control.
Sort Your YouTube Playlists. Simple.
Why YouTube won't do this? I don't know.
¯\_( ツ)_/¯
This limit is necessary as longer playlists will likely crash the site, due to limited resources.