The server was working just fine, however since yesterday the server closes when I join.
I have uploaded the same map in another account however nothing worked
Version: Spigot 1.12.2
Plugins:ActionBar Health
[03:21:28] [Server thread/INFO]: Preparing start region for level 0 (Seed: -5062532501779793414)
[03:21:29] [Server thread/INFO]: Preparing spawn area: 0%
[03:21:30] [Server thread/INFO]: Preparing spawn area: 40%
[03:21:31] [Server thread/INFO]: Preparing spawn area: 96%
[03:21:31] [Server thread/INFO]: Preparing start region for level 1 (Seed: 5104493522013360242)
[03:21:32] [Server thread/INFO]: Preparing spawn area: 56%
[03:21:33] [Server thread/INFO]: Preparing start region for level 2 (Seed: 5104493522013360242)
[03:21:33] [Server thread/INFO]: [ActionHealth] Enabling ActionHealth v3.2.3
[03:21:33] [Server thread/INFO]: Server permissions file permissions.yml is empty, ignoring it
[03:21:33] [Server thread/INFO]: Done (6.540s)! For help, type "help" or "?"
[03:21:33] [Server thread/INFO]: Starting GS4 status listener
[03:21:33] [Query Listener #1/INFO]: Query running on 0.0.0.0:48661
[03:21:53] [User Authenticator #1/INFO]: UUID of player Thebloopboop is 6e20ce6b-a071-4eae-9b49-1b7bd26ece23
[03:21:54] [Server thread/INFO]: Thebloopboop has made the advancement [Suit Up]
[03:21:54] [Server thread/INFO]: Thebloopboop has made the advancement [Ice Bucket Challenge]
[03:21:54] [Server thread/INFO]: Thebloopboop has made the advancement [Stone Age]
[03:21:54] [Server thread/INFO]: Thebloopboop has made the advancement [Isn't It Iron Pick]
[03:21:55] [Server thread/INFO]: Thebloopboop has made the advancement [Hot Stuff]
[03:21:55] [Server thread/INFO]: Thebloopboop[/60.246.161.35:64571] logged in with entity id 235 at ([world]607.2391636659057, 65.0, 135.23220437359652)
[03:21:56] [Chunk I/O Executor Thread-1/WARN]: Could not set level chunk heightmap, array length is 0 instead of 256
[03:21:56] [Chunk I/O Executor Thread-1/WARN]: Could not set level chunk heightmap, array length is 0 instead of 256
[03:21:56] [Chunk I/O Executor Thread-1/WARN]: Could not set level chunk heightmap, array length is 0 instead of 256
[03:21:56] [Chunk I/O Executor Thread-1/WARN]: Could not set level chunk heightmap, array length is 0 instead of 256
[03:21:56] [Chunk I/O Executor Thread-1/WARN]: Could not set level chunk heightmap, array length is 0 instead of 256
[03:21:56] [Chunk I/O Executor Thread-1/WARN]: Could not set level chunk heightmap, array length is 0 instead of 256
[03:21:56] [Chunk I/O Executor Thread-1/WARN]: Could not set level chunk heightmap, array length is 0 instead of 256
[03:21:56] [Server thread/ERROR]: Encountered an unexpected exception
java.lang.IllegalArgumentException: ChunkNibbleArrays should be 2048 bytes not: 0
at net.minecraft.server.v1_12_R1.NibbleArray.<init>(NibbleArray.java:14) ~inecraft_server.jar:git-Spigot-eb3d921-2b93d83]
at net.minecraft.server.v1_12_R1.ChunkRegionLoader.a(ChunkRegionLoader.java:402) ~inecraft_server.jar:git-Spigot-eb3d921-2b93d83]
at net.minecraft.server.v1_12_R1.ChunkRegionLoader.a(ChunkRegionLoader.java:94) ~inecraft_server.jar:git-Spigot-eb3d921-2b93d83]
at net.minecraft.server.v1_12_R1.ChunkRegionLoader.loadChunk(ChunkRegionLoader.java:72) ~inecraft_server.jar:git-Spigot-eb3d921-2b93d83]
at org.bukkit.craftbukkit.v1_12_R1.chunkio.ChunkIOProvider.callStage1(ChunkIOProvider.java:21) ~inecraft_server.jar:git-Spigot-eb3d921-2b93d83]
at org.bukkit.craftbukkit.v1_12_R1.chunkio.ChunkIOProvider.callStage1(ChunkIOProvider.java:1) ~inecraft_server.jar:git-Spigot-eb3d921-2b93d83]
at org.bukkit.craftbukkit.v1_12_R1.util.AsynchronousExecutor$Task.init(AsynchronousExecutor.java:150) ~inecraft_server.jar:git-Spigot-eb3d921-2b93d83]
at org.bukkit.craftbukkit.v1_12_R1.util.AsynchronousExecutor$Task.initAsync(AsynchronousExecutor.java:95) ~inecraft_server.jar:git-Spigot-eb3d921-2b93d83]
at org.bukkit.craftbukkit.v1_12_R1.util.AsynchronousExecutor$Task.run(AsynchronousExecutor.java:85) ~inecraft_server.jar:git-Spigot-eb3d921-2b93d83]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[?:1.8.0_144]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[?:1.8.0_144]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_144]
[03:21:56] [Server thread/ERROR]: This crash report has been saved to: /aternos/server/./crash-reports/crash-2018-07-26_03.21.56-server.txt
[03:21:56] [Server thread/INFO]: Stopping server
[03:21:56] [Server thread/INFO]: [ActionHealth] Disabling ActionHealth v3.2.3
[03:21:57] [Server thread/INFO]: Saving players
[03:21:57] [Server thread/INFO]: Thebloopboop lost connection: Server closed
[03:21:57] [Server thread/INFO]: Thebloopboop left the game
[03:21:57] [Server thread/INFO]: Saving worlds
[03:21:57] [Server thread/INFO]: Saving chunks for level 'world'/overworld
[03:21:59] [Server thread/INFO]: Saving chunks for level 'world_nether'/the_nether
[03:21:59] [Server thread/INFO]: Saving chunks for level 'world_the_end'/the_end