>papi enablecloud
[00:10:45 WARN]: Unexpected exception while parsing console command "papi enablecloud"
org.bukkit.command.CommandException: Unhandled exception executing command 'papi' in plugin PlaceholderAPI v2.8.7
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-550ebace-7019900e]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot.jar:git-Spigot-550ebace-7019900e]
        at org.bukkit.craftbukkit.v1_8_R1.CraftServer.dispatchCommand(CraftServer.java:646) ~[spigot.jar:git-Spigot-550ebace-7019900e]
        at org.bukkit.craftbukkit.v1_8_R1.CraftServer.dispatchServerCommand(CraftServer.java:632) [spigot.jar:git-Spigot-550ebace-7019900e]
        at net.minecraft.server.v1_8_R1.DedicatedServer.aM(DedicatedServer.java:353) [spigot.jar:git-Spigot-550ebace-7019900e]
        at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:317) [spigot.jar:git-Spigot-550ebace-7019900e]
        at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:634) [spigot.jar:git-Spigot-550ebace-7019900e]
        at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:537) [spigot.jar:git-Spigot-550ebace-7019900e]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_171]
Caused by: java.lang.NoClassDefFoundError: com/google/gson/Gson
        at me.clip.placeholderapi.expansion.cloud.ExpansionCloudManager.<init>(ExpansionCloudManager.java:54) ~[?:?]
        at me.clip.placeholderapi.PlaceholderAPIPlugin.enableCloud(PlaceholderAPIPlugin.java:182) ~[?:?]
        at me.clip.placeholderapi.commands.PlaceholderAPICommands.onCommand(PlaceholderAPICommands.java:110) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-550ebace-7019900e]
        ... 8 more