CTSNC NameTag Error

[CTSNC_NameTag] Task #83 for CTSNC_NameTag v1.1 generated an exception
java.lang.NullPointerException
        at de.Herbystar.CTSNC.ReplaceString.replaceString(ReplaceString.java:110) ~[?:?]
        at de.Herbystar.CTSNC_Modules.NameTag.CustomTags.updatePrefix(CustomTags.java:51) ~[?:?]
        at de.Herbystar.CTSNC_Modules.NameTag.CustomTags.updateCustomTags(CustomTags.java:172) ~[?:?]
        at de.Herbystar.CTSNC_Modules.NameTag.Main$1.run(Main.java:34) ~[?:?]
        at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot.jar:git-Spigot-d4f98a3-cb61ac0]
        at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:353) [spigot.jar:git-Spigot-d4f98a3-cb61ac0]
        at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:738) [spigot.jar:git-Spigot-d4f98a3-cb61ac0]
        at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399) [spigot.jar:git-Spigot-d4f98a3-cb61ac0]
        at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:678) [spigot.jar:git-Spigot-d4f98a3-cb61ac0]
        at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:576) [spigot.jar:git-Spigot-d4f98a3-cb61ac0]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]