Starting server Error this build is outdated Please download a new build as per instructions from httpswwwspigotmcorggooutdated-spigot Server will start in 20 seconds

Based on the given information, it appears that the server being started is using an outdated build. To resolve this issue, you need to download a new build by following the instructions provided at https://www.spigotmc.org/go/outdated-spigot. Once you have downloaded the updated build, you can proceed with starting the server again. The server will automatically start in 20 seconds.