Error ShopGUI+ 1.19

[10:36:28 INFO]: [ShopGUIPlus] Enabling ShopGUIPlus v1.19.0
[10:36:28 INFO]: [ShopGUIPlus] Permissions support enabled.
[10:36:28 WARN]: [ShopGUIPlus] Spawners plugin not found, spawners won't be supported.
[10:36:28 ERROR]: Error occurred while enabling ShopGUIPlus v1.19.0 (Is it up to date?)
java.lang.IllegalArgumentException: null
        at net.brcdev.shopgui.util.ItemUtils.loadItemStackFromConfig(ItemUtils.java:127) ~[?:?]
        at net.brcdev.shopgui.settings.MenuSettings.load(MenuSettings.java:71) ~[?:?]
        at net.brcdev.shopgui.settings.MenuSettings.<init>(MenuSettings.java:22) ~[?:?]
        at net.brcdev.shopgui.settings.MenuWithItemSettings.<init>(MenuWithItemSettings.java:14) ~[?:?]
        at net.brcdev.shopgui.config.Settings.load(Settings.java:368) ~[?:?]
        at net.brcdev.shopgui.config.Settings.setConfig(Settings.java:147) ~[?:?]
        at net.brcdev.shopgui.ShopGuiPlugin.load(ShopGuiPlugin.java:188) ~[?:?]
        at net.brcdev.shopgui.ShopGuiPlugin.onEnable(ShopGuiPlugin.java:146) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:264) ~[spigot-1.12.2.jar:git-Spigot-642f6d2-57ab4cf]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:337) [spigot-1.12.2.jar:git-Spigot-642f6d2-57ab4cf]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:403) [spigot-1.12.2.jar:git-Spigot-642f6d2-57ab4cf]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugin(CraftServer.java:381) [spigot-1.12.2.jar:git-Spigot-642f6d2-57ab4cf]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugins(CraftServer.java:330) [spigot-1.12.2.jar:git-Spigot-642f6d2-57ab4cf]
        at net.minecraft.server.v1_12_R1.MinecraftServer.t(MinecraftServer.java:422) [spigot-1.12.2.jar:git-Spigot-642f6d2-57ab4cf]
        at net.minecraft.server.v1_12_R1.MinecraftServer.l(MinecraftServer.java:383) [spigot-1.12.2.jar:git-Spigot-642f6d2-57ab4cf]
        at net.minecraft.server.v1_12_R1.MinecraftServer.a(MinecraftServer.java:338) [spigot-1.12.2.jar:git-Spigot-642f6d2-57ab4cf]
        at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:272) [spigot-1.12.2.jar:git-Spigot-642f6d2-57ab4cf]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:545) [spigot-1.12.2.jar:git-Spigot-642f6d2-57ab4cf]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_161]
>shop
[10:38:49 INFO]: Shop failed to load. Please check the server log for errors.
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