[22:03:24 ERROR]: [PlaceholderAPI] Failed to load expansion class JavascriptExpansion (Is a dependency missing?)
java.lang.UnsupportedClassVersionError: org/openjdk/nashorn/api/scripting/NashornScriptEngineFactory has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_421]
at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.8.0_421]
at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.8.0_421]
at java.net.URLClassLoader.defineClass(Unknown Source) ~[?:1.8.0_421]
at java.net.URLClassLoader.access$100(Unknown Source) ~[?:1.8.0_421]
at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.8.0_421]
at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.8.0_421]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_421]
at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_421]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_421]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_421]
at com.extendedclip.papi.expansion.javascript.evaluator.NashornScriptEvaluatorFactory.create(NashornScriptEvaluatorFactory.java:34) ~[?:?]
at com.extendedclip.papi.expansion.javascript.JavascriptExpansion.createNashornEvaluatorFactory(JavascriptExpansion.java:177) ~[?:?]
at com.extendedclip.papi.expansion.javascript.JavascriptExpansion.register(JavascriptExpansion.java:97) ~[?:?]
at me.clip.placeholderapi.expansion.manager.LocalExpansionManager.register(LocalExpansionManager.java:193) ~[?:?]
at java.util.stream.ReferencePipeline$3$1.accept(Unknown Source) ~[?:1.8.0_421]
at java.util.stream.ReferencePipeline$2$1.accept(Unknown Source) ~[?:1.8.0_421]
at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(Unknown Source) ~[?:1.8.0_421]
at java.util.stream.AbstractPipeline.copyInto(Unknown Source) ~[?:1.8.0_421]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source) ~[?:1.8.0_421]
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(Unknown Source) ~[?:1.8.0_421]
at java.util.stream.AbstractPipeline.evaluate(Unknown Source) ~[?:1.8.0_421]
at java.util.stream.ReferencePipeline.collect(Unknown Source) ~[?:1.8.0_421]
at me.clip.placeholderapi.expansion.manager.LocalExpansionManager.lambda$registerAll$4(LocalExpansionManager.java:366) ~[?:?]
at me.clip.placeholderapi.util.Futures.lambda$null$0(Futures.java:46) ~[?:?]
at org.bukkit.craftbukkit.v1_16_R3.scheduler.CraftTask.run(CraftTask.java:101) ~[patched_1.16.5.jar:git-Paper-794]
at org.bukkit.craftbukkit.v1_16_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:485) ~[patched_1.16.5.jar:git-Paper-794]
at net.minecraft.server.v1_16_R3.MinecraftServer.b(MinecraftServer.java:1432) ~[patched_1.16.5.jar:git-Paper-794]
at net.minecraft.server.v1_16_R3.DedicatedServer.b(DedicatedServer.java:436) ~[patched_1.16.5.jar:git-Paper-794]
at net.minecraft.server.v1_16_R3.MinecraftServer.a(MinecraftServer.java:1347) ~[patched_1.16.5.jar:git-Paper-794]
at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1135) ~[patched_1.16.5.jar:git-Paper-794]
at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:291) ~[patched_1.16.5.jar:git-Paper-794]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_421]