I updated my 1.13.2 Spigot server with --forceUpgrade after changing the server jar to spigot-1.14-pre5 which seemed to go smoothly. But when refreshing my server page and trying to connect I got some errors. When refreshing or going to my multiplayer page the console spits this out here. And when attempting to connect I immediately got disconnected and got this error in the console here. If this is a Spigot issue I hope that you can resolve this soon to get a smooth release for the official 1.14 update. Thank you for all of your hard work and releasing Spigot for the pre-releases to get everything straightened out.