error

[00:43:18 ERROR]: Error occurred while disabling LagMonitor v1.17.1-SNAPSHOT (Is it up to date?)
java.lang.IllegalArgumentException: Cannot find field with type interface java.lang.Runnable
        at com.github.games647.lagmonitor.traffic.Reflection.getField(Reflection.java:184) ~[?:?]
        at com.github.games647.lagmonitor.traffic.Reflection.getField(Reflection.java:181) ~[?:?]
        at com.github.games647.lagmonitor.traffic.Reflection.getField(Reflection.java:103) ~[?:?]
        at com.github.games647.lagmonitor.inject.TaskInjector.restore(TaskInjector.java:62) ~[?:?]
        at com.github.games647.lagmonitor.LagMonitor.onDisable(LagMonitor.java:183) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:256) ~[patched_1.13.2.jar:git-Paper-461]
        at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoader.java:359) ~[patched_1.13.2.jar:git-Paper-461]
        at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:437) ~[patched_1.13.2.jar:git-Paper-461]
        at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginManager.java:424) ~[patched_1.13.2.jar:git-Paper-461]
        at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginManager.java:417) ~[patched_1.13.2.jar:git-Paper-461]
        at org.bukkit.craftbukkit.v1_13_R2.CraftServer.disablePlugins(CraftServer.java:375) ~[patched_1.13.2.jar:git-Paper-461]
        at net.minecraft.server.v1_13_R2.MinecraftServer.stop(MinecraftServer.java:656) ~[patched_1.13.2.jar:git-Paper-461]
        at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:878) ~[patched_1.13.2.jar:git-Paper-461]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_192]