Hỏi đáp lỗi wildchests và economyshopgui

[17:19:21] [Server thread/WARN]: [WildChests] Loaded class me.gypopo.economyshopgui.api.EconomyShopGUIHook from EconomyShopGUI v4.2.0 which is not a depend, softdepend or loadbefore of this plugin.
[17:19:21] [Server thread/ERROR]: Encountered an unexpected exception
net.minecraft.server.v1_16_R3.ReportedException: Ticking block entity
at net.minecraft.server.v1_16_R3.MinecraftServer.b(MinecraftServer.java:1237) ~[spigot-1.16.5.jar:3096a-Spigot-9fb885e-af1a232]
at net.minecraft.server.v1_16_R3.DedicatedServer.b(DedicatedServer.java:394) ~[spigot-1.16.5.jar:3096a-Spigot-9fb885e-af1a232]
at net.minecraft.server.v1_16_R3.MinecraftServer.a(MinecraftServer.java:1127) ~[spigot-1.16.5.jar:3096a-Spigot-9fb885e-af1a232]
at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:966) ~[spigot-1.16.5.jar:3096a-Spigot-9fb885e-af1a232]
at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$0(MinecraftServer.java:273) ~[spigot-1.16.5.jar:3096a-Spigot-9fb885e-af1a232]
at java.lang.Thread.run(Thread.java:831) [?:?]
Caused by: java.lang.NullPointerException: Cannot invoke "java.lang.Double.doubleValue()"
at com.bgsoftware.wildchests.hooks.PricesProvider_EconomyShopGUI.getPrice(PricesProvider_EconomyShopGUI.java:20) ~[?:?]
at com.bgsoftware.wildchests.handlers.ProvidersHandler.getPrice(ProvidersHandler.java:84) ~[?:?]
at com.bgsoftware.wildchests.handlers.ProvidersHandler.canSellItem(ProvidersHandler.java:104) ~[?:?]
at com.bgsoftware.wildchests.utils.ChestUtils.trySellItem(ChestUtils.java:119) ~[?:?]
at com.bgsoftware.wildchests.utils.ChestUtils.lambda$trySellChest$1(ChestUtils.java:106) ~[?:?]
at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948) ~[?:?]
at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) ~[?:?]
at com.bgsoftware.wildchests.utils.ChestUtils.trySellChest(ChestUtils.java:104) ~[?:?]
at com.bgsoftware.wildchests.nms.NMSInventory_v1_16_R3$TileEntityWildChest.tick(NMSInventory_v1_16_R3.java:338) ~[?:?]
at net.minecraft.server.v1_16_R3.World.tickBlockEntities(World.java:695) ~[spigot-1.16.5.jar:3096a-Spigot-9fb885e-af1a232]
at net.minecraft.server.v1_16_R3.WorldServer.doTick(WorldServer.java:533) ~[spigot-1.16.5.jar:3096a-Spigot-9fb885e-af1a232]
at net.minecraft.server.v1_16_R3.MinecraftServer.b(MinecraftServer.java:1224) ~[spigot-1.16.5.jar:3096a-Spigot-9fb885e-af1a232]
... 5 more
[17:19:21] [Server thread/ERROR]: Cause of unexpected exception was
java.lang.NullPointerException: Cannot invoke "java.lang.Double.doubleValue()"
at com.bgsoftware.wildchests.hooks.PricesProvider_EconomyShopGUI.getPrice(PricesProvider_EconomyShopGUI.java:20) ~[?:?]
at com.bgsoftware.wildchests.handlers.ProvidersHandler.getPrice(ProvidersHandler.java:84) ~[?:?]
at com.bgsoftware.wildchests.handlers.ProvidersHandler.canSellItem(ProvidersHandler.java:104) ~[?:?]
at com.bgsoftware.wildchests.utils.ChestUtils.trySellItem(ChestUtils.java:119) ~[?:?]
at com.bgsoftware.wildchests.utils.ChestUtils.lambda$trySellChest$1(ChestUtils.java:106) ~[?:?]
at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948) ~[?:?]
at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) ~[?:?]
at com.bgsoftware.wildchests.utils.ChestUtils.trySellChest(ChestUtils.java:104) ~[?:?]
at com.bgsoftware.wildchests.nms.NMSInventory_v1_16_R3$TileEntityWildChest.tick(NMSInventory_v1_16_R3.java:338) ~[?:?]
at net.minecraft.server.v1_16_R3.World.tickBlockEntities(World.java:695) ~[spigot-1.16.5.jar:3096a-Spigot-9fb885e-af1a232]
at net.minecraft.server.v1_16_R3.WorldServer.doTick(WorldServer.java:533) ~[spigot-1.16.5.jar:3096a-Spigot-9fb885e-af1a232]
at net.minecraft.server.v1_16_R3.MinecraftServer.b(MinecraftServer.java:1224) ~[spigot-1.16.5.jar:3096a-Spigot-9fb885e-af1a232]
at net.minecraft.server.v1_16_R3.DedicatedServer.b(DedicatedServer.java:394) ~[spigot-1.16.5.jar:3096a-Spigot-9fb885e-af1a232]
at net.minecraft.server.v1_16_R3.MinecraftServer.a(MinecraftServer.java:1127) ~[spigot-1.16.5.jar:3096a-Spigot-9fb885e-af1a232]
at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:966) ~[spigot-1.16.5.jar:3096a-Spigot-9fb885e-af1a232]
at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$0(MinecraftServer.java:273) ~[spigot-1.16.5.jar:3096a-Spigot-9fb885e-af1a232]
at java.lang.Thread.run(Thread.java:831) [?:?]

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