Starting December 1st 2017, the Auto Tagging functionality on versions of Plex Media Server prior to 1.9.3 will be disabled. Please upgrade to the latest version of Plex Media Server to ensure you are not affected. Apologies for any inconvenience this may have caused. We’ve implemented throttling to curb abuse and improved auto tagging functionality, but we had to deprecate the old API key with our partner in the process.