Bukkit Server Closing itself / crash

Im encoutering this error:



[19:56:53 INFO]: DoctorAnon issued server command: /p h 10
[19:56:53 ERROR]: Encountered an unexpected exception
java.lang.NoClassDefFoundError: Could not initialize class net.minecraft.server.v1_12_R1.CrashReport
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:744) ~[craftbukkit.jar:git-Bukkit-e60fc34]
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:371) ~[craftbukkit.jar:git-Bukkit-e60fc34]
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:651) ~[craftbukkit.jar:git-Bukkit-e60fc34]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:555) [craftbukkit.jar:git-Bukkit-e60fc34]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_211]
[19:56:53 INFO]: Stopping server



Im new to forums, apologies in advance if i did not provide enough info.

Update, new logs.

Too big to paste here so here:
https://pastebin.com/piAdHdUF

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

https://pastebin.com/2zuzCMBE