java.lang.NullPointerException

org.bukkit.command.CommandException: Unhandled exception executing command 'placeholderapi' in plugin PlaceholderAPI v2.11.2
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[arclight:arclight-1.16.5-1.0.25-SNAPSHOT-aeef36e9] {re:classloading}
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:149) ~[arclight:arclight-1.16.5-1.0.25-SNAPSHOT-aeef36e9] {re:classloading}
        at org.bukkit.craftbukkit.v1_16_R3.CraftServer.dispatchCommand(CraftServerMixin.java:761) ~[arclight:arclight-1.16.5-1.0.25-SNAPSHOT-aeef36e9] {re:mixin,re:classloading,pl:mixin:APP:mixins.arclight.bukkit.json:CraftServerMixin,pl:mixin:A,pl:arclight_implementer:switch,pl:arclight_implementer:A}
        at org.bukkit.craftbukkit.v1_16_R3.CraftServer.dispatchServerCommand(CraftServerMixin.java:746) ~[arclight:arclight-1.16.5-1.0.25-SNAPSHOT-aeef36e9] {re:mixin,re:classloading,pl:mixin:APP:mixins.arclight.bukkit.json:CraftServerMixin,pl:mixin:A,pl:arclight_implementer:switch,pl:arclight_implementer:A}
        at net.minecraft.server.dedicated.DedicatedServer.redirect$bbf000$arclight$serverCommandEvent(DedicatedServerMixin.java:655) ~[?:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.dedicated.DedicatedServerMixin,pl:mixin:A}
        at net.minecraft.server.dedicated.DedicatedServer.func_71333_ah(DedicatedServerMixin.java:312) ~[?:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.dedicated.DedicatedServerMixin,pl:mixin:A}
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServerMixin.java:292) ~[?:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.dedicated.DedicatedServerMixin,pl:mixin:A}
        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServerMixin.java:787) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.MinecraftServerMixin,pl:mixin:APP:byg.mixins.json:server.MixinMinecraftServer,pl:mixin:A,pl:runtimedistcleaner:A}
        at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServerMixin.java:1917) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.MinecraftServerMixin,pl:mixin:APP:byg.mixins.json:server.MixinMinecraftServer,pl:mixin:A,pl:runtimedistcleaner:A}
        at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServerMixin.java:232) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.MinecraftServerMixin,pl:mixin:APP:byg.mixins.json:server.MixinMinecraftServer,pl:mixin:A,pl:runtimedistcleaner:A}
        at java.lang.Thread.run(Thread.java:829) [?:?] {}
Caused by: java.lang.NullPointerException
        at com.envyful.papi.api.manager.AbstractPlaceholderManager.onPlaceholderRequest(AbstractPlaceholderManager.java:94) ~[forgeplaceholderapi:?] {re:classloading}
        at com.envyful.papi.api.util.UtilPlaceholder.replaceIdentifiers(UtilPlaceholder.java:44) ~[forgeplaceholderapi:?] {re:classloading,re:mixin}
        at com.envyful.spigot.papi.bridge.SpigotPAPIBridge.onRequest(SpigotPAPIBridge.java:37) ~[?:?] {re:classloading,re:classloading,re:classloading,re:classloading}
        at me.clip.placeholderapi.replacer.CharsReplacer.apply(CharsReplacer.java:119) ~[?:?] {re:classloading,re:classloading,re:classloading}
        at me.clip.placeholderapi.PlaceholderAPI.setPlaceholders(PlaceholderAPI.java:71) ~[?:?] {re:classloading,re:classloading,re:classloading}
        at me.clip.placeholderapi.commands.impl.local.CommandParse.evaluateParseSingular(CommandParse.java:118) ~[?:?] {re:classloading,re:classloading,re:classloading}
        at me.clip.placeholderapi.commands.impl.local.CommandParse.evaluate(CommandParse.java:58) ~[?:?] {re:classloading,re:classloading,re:classloading}
        at me.clip.placeholderapi.commands.PlaceholderCommandRouter.onCommand(PlaceholderCommandRouter.java:114) ~[?:?] {re:classloading,re:classloading,re:classloading}
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[arclight:arclight-1.16.5-1.0.25-SNAPSHOT-aeef36e9] {re:classloading}
        ... 10 more