slimefun bug report logs

> [16:48:48 WARN]: [Slimefun] Task #27920 for Slimefun vv4.1.15 generated an exception
java.lang.NoClassDefFoundError: me/mrCookieSlime/CSCoreLibPlugin/general/Particles/MC_1_8/ParticleEffect
at me.mrCookieSlime.Slimefun.AncientAltar.RitualAnimation.idle(RitualAnimation.java:64) ~[?:?]
at me.mrCookieSlime.Slimefun.AncientAltar.RitualAnimation.run(RitualAnimation.java:50) ~[?:?]
at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:76) ~[minecraft_server.jar:git-Spigot-2cf50f0-2b93d83]
at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:361) [minecraft_server.jar:git-Spigot-2cf50f0-2b93d83]
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:739) [minecraft_server.jar:git-Spigot-2cf50f0-2b93d83]
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [minecraft_server.jar:git-Spigot-2cf50f0-2b93d83]
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [minecraft_server.jar:git-Spigot-2cf50f0-2b93d83]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [minecraft_server.jar:git-Spigot-2cf50f0-2b93d83]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]