Swift_999_

Okay so I put a Level Name in but now our world is gone and it is a brand new world?? What do I do to get my original world back

Hey so i put a world in there and now the world we were working on is gone

This is all the errors i got [13:22:34 ERROR]: Encountered an unexpected exception java.lang.NullPointerException: null at net.minecraft.server.v1_16_R3.MinecraftServer.loadWorld(MinecraftServer.java:491) ~[patched_1.16.5.jar:git-Paper-771] at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:298) ~[patched_1.16.5.jar:git-Paper-771] at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1069) ~[patched_1.16.5.jar:git-Paper-771] at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:291) ~[patched_1.16.5.jar:git-Paper-771] at java.lang.Thread.run(Thread.java:829) [?:?] [13:22:34 ERROR]: This crash report has been saved to: /home/minecraft/server/./crash-reports/crash-2021-10-15_13.22.34-server.txt [13:26:35 ERROR]: No key layers in MapLike[{}]; No key structures in MapLike[{}] [13:26:52 ERROR]: Encountered an unexpected exception java.lang.NullPointerException: null at net.minecraft.server.v1_16_R3.MinecraftServer.loadWorld(MinecraftServer.java:491) ~[patched_1.16.5.jar:git-Paper-771] at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:298) ~[patched_1.16.5.jar:git-Paper-771] at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1069) ~[patched_1.16.5.jar:git-Paper-771] at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:291) ~[patched_1.16.5.jar:git-Paper-771] at java.lang.Thread.run(Thread.java:829) [?:?] [13:26:52 ERROR]: This crash report has been saved to: /home/minecraft/server/./crash-reports/crash-2021-10-15_13.26.52-server.txt

Me and a friend started a server using this account. We made a Box server just to bond and have some fun. It got a few players but never more than 2 at a time (not including us). Well I put some plugins on so we can add ranks using a MineHut tutorial and the server crashed and wont start