[17:26:53] [Server thread/ERROR]: Could not load 'plugins/Broadcaster-2.2.0.jar' in folder 'plugins' org.bukkit.plugin.UnknownDependencyException: PocketKnife at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:221) [server.jar:git-Bukkit-8160e29] at org.bukkit.craftbukkit.v1_15_R1.CraftServer.loadPlugins(CraftServer.java:349) [server.jar:git-Bukkit-8160e29] at net.minecraft.server.v1_15_R1.DedicatedServer.init(DedicatedServer.java:197) [server.jar:git-Bukkit-8160e29] at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:762) [server.jar:git-Bukkit-8160e29] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_171]
I can provide the full startup log if needed :)

You have to install an additional plugin as a dependency: PocketKnife

Thanks :)