Hosted Server Keeps Crashing On Startup

Hi, I use Fluctis Hosting 6gb package. whenever I press the startup button it will start then it just crashes and dies.
Yesterday it was working just fine and the only thing that I did different was I banned a couple of people (I've done that before) and some bases were build by people (I launched my server publically yesterday and it was working)

My plugins are
Essentials,
bin
buycraft
chatmanipulation
crazyenvoy
ce
discoarmour
clearlagg
factions
and a few others (but none of my plugins have changed in the course of time)

I have seen some people saying to run a different execution command but I can't do that because I have a hosted server. Any clue why my server keeps crashing?? please help!

 

[19:47:13] [pool-3-thread-318/WARN]: [RedeemMCMMO] Plugin RedeemMCMMO v1.1.5 generated an exception while executing task 83
java.lang.NoSuchMethodError: org.bukkit.Server.getOnlinePlayers()[Lorg/bukkit/entity/Player;
at com.flapfactions.redeemMCMMO.Metrics.postPlugin(Metrics.java:357) ~[?:?]
at com.flapfactions.redeemMCMMO.Metrics.access$4(Metrics.java:350) ~[?:?]
at com.flapfactions.redeemMCMMO.Metrics$1.run(Metrics.java:245) ~[?:?]
at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftTask.run(CraftTask.java:53) ~[craftbukkit-1.11.2.jar:git-Bukkit-a1d3777]
at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:52) [craftbukkit-1.11.2.jar:git-Bukkit-a1d3777]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_121]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
[19:47:33] [Server thread/INFO]: [0;31;22m[ClearLag] [0;31;1mWarning Ground items will be removed in [0;37;22m20 [0;31;1mseconds![m
[19:47:53] [Server thread/INFO]: [0;33;22m[ClearLag] [0;32;1mRemoved 0 Entities![m
[19:54:33] [Server thread/INFO]: [0;31;22m[ClearLag] [0;31;1mWarning Ground items will be removed in [0;37;22m60 [0;31;1mseconds![m
[19:55:13] [Server thread/INFO]: [0;31;22m[ClearLag] [0;31;1mWarning Ground items will be removed in [0;37;22m20 [0;31;1mseconds![m
[19:55:33] [Server thread/INFO]: [0;33;22m[ClearLag] [0;32;1mRemoved 0 Entities![m
[19:57:13] [pool-3-thread-330/WARN]: [DiscoArmor] Plugin DiscoArmor v2.6.2 generated an exception while executing task 49
java.lang.NoSuchMethodError: org.bukkit.Server.getOnlinePlayers()[Lorg/bukkit/entity/Player;
at de.lualzockt.DiscoArmor.Utils.PluginMetrics.postPlugin(PluginMetrics.java:336) ~[?:?]
at de.lualzockt.DiscoArmor.Utils.PluginMetrics.access$4(PluginMetrics.java:329) ~[?:?]
at de.lualzockt.DiscoArmor.Utils.PluginMetrics$1.run(PluginMetrics.java:224) ~[?:?]
at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftTask.run(CraftTask.java:53) ~[craftbukkit-1.11.2.jar:git-Bukkit-a1d3777]
at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:52) [craftbukkit-1.11.2.jar:git-Bukkit-a1d3777]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_121]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
[19:57:13] [pool-3-thread-333/WARN]: [RedeemMCMMO] Plugin RedeemMCMMO v1.1.5 generated an exception while executing task 83
java.lang.NoSuchMethodError: org.bukkit.Server.getOnlinePlayers()[Lorg/bukkit/entity/Player;
at com.flapfactions.redeemMCMMO.Metrics.postPlugin(Metrics.java:357) ~[?:?]
at com.flapfactions.redeemMCMMO.Metrics.access$4(Metrics.java:350) ~[?:?]
at com.flapfactions.redeemMCMMO.Metrics$1.run(Metrics.java:245) ~[?:?]
at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftTask.run(CraftTask.java:53) ~[craftbukkit-1.11.2.jar:git-Bukkit-a1d3777]
at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:52) [craftbukkit-1.11.2.jar:git-Bukkit-a1d3777]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_121]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
[19:57:43] [pool-3-thread-336/INFO]: [BuycraftX] Fetching all due players...
[19:57:44] [pool-3-thread-336/INFO]: [BuycraftX] Fetched due players (0 found).
[20:02:13] [Server thread/INFO]: [0;31;22m[ClearLag] [0;31;1mWarning Ground items will be removed in [0;37;22m60 [0;31;1mseconds![m
[20:02:53] [Server thread/INFO]: [0;31;22m[ClearLag] [0;31;1mWarning Ground items will be removed in [0;37;22m20 [0;31;1mseconds![m
[20:03:13] [Server thread/INFO]: [0;33;22m[ClearLag] [0;32;1mRemoved 0 Entities![m
[20:07:13] [pool-3-thread-341/WARN]: [RedeemMCMMO] Plugin RedeemMCMMO v1.1.5 generated an exception while executing task 83
java.lang.NoSuchMethodError: org.bukkit.Server.getOnlinePlayers()[Lorg/bukkit/entity/Player;
at com.flapfactions.redeemMCMMO.Metrics.postPlugin(Metrics.java:357) ~[?:?]
at com.flapfactions.redeemMCMMO.Metrics.access$4(Metrics.java:350) ~[?:?]
at com.flapfactions.redeemMCMMO.Metrics$1.run(Metrics.java:245) ~[?:?]
at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftTask.run(CraftTask.java:53) ~[craftbukkit-1.11.2.jar:git-Bukkit-a1d3777]
at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:52) [craftbukkit-1.11.2.jar:git-Bukkit-a1d3777]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_121]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]

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