NoClassDefFoundError on start-up

[SlimeDog]

Spigot 1.15.2 (Jenkins 2623)
BentoBox 1.11.1-SNAPSHOT-b1644

BentoBox fails to load/enable on start-up

[23:55:33] [Server thread/ERROR]: Error occurred while enabling BentoBox v1.11.1-SNAPSHOT-b1644 (Is it up to date?)
java.lang.NoClassDefFoundError: be/maximvdw/placeholderapi/internal/utils/NumberUtils
        at world.bentobox.bentobox.managers.AddonsManager.isAddonCompatibleWithBentoBox(AddonsManager.java:234) ~[?:?]
        at world.bentobox.bentobox.managers.AddonsManager.isAddonCompatibleWithBentoBox(AddonsManager.java:218) ~[?:?]
        at world.bentobox.bentobox.managers.AddonsManager.loadAddon(AddonsManager.java:122) ~[?:?]
        at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) ~[?:?]
        at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) ~[?:?]
        at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948) ~[?:?]
        at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) ~[?:?]
        at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[?:?]
        at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) ~[?:?]
        at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) ~[?:?]
        at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?]
        at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) ~[?:?]
        at world.bentobox.bentobox.managers.AddonsManager.loadAddons(AddonsManager.java:76) ~[?:?]
        at world.bentobox.bentobox.BentoBox.onEnable(BentoBox.java:165) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263) ~[spigot-1.15.2.jar-2020-02-07-0553:git-Spigot-c574e08-c985389]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:351) [spigot-1.15.2.jar-2020-02-07-0553:git-Spigot-c574e08-c985389]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:432) [spigot-1.15.2.jar-2020-02-07-0553:git-Spigot-c574e08-c985389]
        at org.bukkit.craftbukkit.v1_15_R1.CraftServer.enablePlugin(CraftServer.java:464) [spigot-1.15.2.jar-2020-02-07-0553:git-Spigot-c574e08-c985389]
        at org.bukkit.craftbukkit.v1_15_R1.CraftServer.enablePlugins(CraftServer.java:378) [spigot-1.15.2.jar-2020-02-07-0553:git-Spigot-c574e08-c985389]
        at net.minecraft.server.v1_15_R1.DedicatedServer.init(DedicatedServer.java:211) [spigot-1.15.2.jar-2020-02-07-0553:git-Spigot-c574e08-c985389]
        at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:784) [spigot-1.15.2.jar-2020-02-07-0553:git-Spigot-c574e08-c985389]
        at java.lang.Thread.run(Thread.java:834) [?:?]
Caused by: java.lang.ClassNotFoundException: be.maximvdw.placeholderapi.internal.utils.NumberUtils
        at java.net.URLClassLoader.findClass(URLClassLoader.java:471) ~[?:?]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:167) ~[spigot-1.15.2.jar-2020-02-07-0553:git-Spigot-c574e08-c985389]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:96) ~[spigot-1.15.2.jar-2020-02-07-0553:git-Spigot-c574e08-c985389]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:588) ~[?:?]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[?:?]
        ... 22 more

[Poslovitch]

Caused by 3329679 from #1176