ShopGuiPlus isn't working when I put in my shops.yml file

[AnarchyCraft]

Hey so this is what console is spitting out, can anyone help me with this?

Spoiler: Console Error

> [02:01:27 INFO]: [SilkSpawners] Enabling SilkSpawners v6.1.0
> [02:01:27 INFO]: [SilkSpawners] WorldGuard was not found and support is disabled
> [02:01:27 INFO]: [SilkSpawners] Loading support for v1_8_R3
> [02:01:27 INFO]: [SilkSpawners] AutoUpdater is enabled.
> [02:01:27 INFO]: [SilkSpawners] Result from AutoUpdater is: NO_UPDATE
> [02:01:27 INFO]: [SilkSpawners] BarAPI is disabled due to config setting.
> [02:01:27 INFO]: [ShopGUIPlus] Enabling ShopGUIPlus v1.15.0
> [02:01:27 INFO]: [ShopGUIPlus] Permissions support enabled.
> [02:01:27 INFO]: [SilkSpawners] WorldGuard was not found and support is disabled
> [02:01:27 INFO]: [SilkSpawners] Loading support for v1_8_R3
> [02:01:27 INFO]: [ShopGUIPlus] SilkSpawners support enabled.
> [02:01:27 ERROR]: Error occurred while enabling ShopGUIPlus v1.15.0 (Is it up to date?)
java.lang.NoSuchMethodError: de.dustplanet.util.SilkUtil.newSpawnerItem(SLjava/lang/String;IZ)Lorg/bukkit/inventory/ItemStack;
at net.brcdev.shopgui.provider.spawner.SpawnerSilkSpawnersProvider.getSpawnerItem(SpawnerSilkSpawnersProvider.java:18) ~[?:?]
at net.brcdev.shopgui.util.ItemUtils.loadItemStackFromConfig(ItemUtils.java:89) ~[?:?]
at net.brcdev.shopgui.shop.ShopManager.loadShops(ShopManager.java:172) ~[?:?]
at net.brcdev.shopgui.ShopGuiPlugin.load(ShopGuiPlugin.java:195) ~[?:?]
at net.brcdev.shopgui.ShopGuiPlugin.onEnable(ShopGuiPlugin.java:149) ~[?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[patched.jar:git-PaperSpigot-"4c7641d"]
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:332) [patched.jar:git-PaperSpigot-"4c7641d"]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:407) [patched.jar:git-PaperSpigot-"4c7641d"]
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.java:359) [patched.jar:git-PaperSpigot-"4c7641d"]
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.java:318) [patched.jar:git-PaperSpigot-"4c7641d"]
at net.minecraft.server.v1_8_R3.MinecraftServer.s(MinecraftServer.java:408) [patched.jar:git-PaperSpigot-"4c7641d"]
at net.minecraft.server.v1_8_R3.MinecraftServer.k(MinecraftServer.java:372) [patched.jar:git-PaperSpigot-"4c7641d"]
at net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:327) [patched.jar:git-PaperSpigot-"4c7641d"]
at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:267) [patched.jar:git-PaperSpigot-"4c7641d"]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:563) [patched.jar:git-PaperSpigot-"4c7641d"]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_242]