NoClassDefFoundError: org/spongepowered/api/event/cause/NamedCause

gistfile1.txt

> /bal ziceptor
[03:40:44] [Server thread/INFO] [nucleus]: Server ran the command: /bal ziceptor
[03:40:44] [pool-3-thread-4/ERROR] [Sponge]: The Scheduler tried to run the task economylite-A-44 owned by Plugin{id=economylite, name=EconomyLite, version=2.12.0, description=An economy plu
gin for Sponge., source=E:\ziCRAFT-1.12.2\mods\EconomyLite-5.0.0-2.12.0.jar}, but an error occured.
java.lang.NoClassDefFoundError: org/spongepowered/api/event/cause/NamedCause
        at io.github.flibio.economylite.CauseFactory.create(CauseFactory.java:34) ~[CauseFactory.class:?]
        at io.github.flibio.economylite.impl.economy.LiteEconomyService.getOrCreateAccount(LiteEconomyService.java:58) ~[LiteEconomyService.class:?]
        at io.github.flibio.economylite.commands.balance.BalanceCommand.run(BalanceCommand.java:70) ~[BalanceCommand.class:?]
        at io.github.flibio.economylite.utils.commands.BaseCommandExecutor.lambda$execute$0(BaseCommandExecutor.java:69) ~[BaseCommandExecutor.class:?]
        at org.spongepowered.common.scheduler.SchedulerBase.lambda$startTask$0(SchedulerBase.java:187) ~[SchedulerBase.class:1.12.2-2486-7.0.0-BETA-2645]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_144]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_144]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_144]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_144]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_144]
Caused by: java.lang.ClassNotFoundException: org.spongepowered.api.event.cause.NamedCause
        at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_144]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_144]
        ... 10 more
Caused by: java.lang.NullPointerException