Error when loading Caveblock blueprint

[tastybento]

Description

Describe the bug

An error is thrown when loading a CaveBlock blueprint.

Steps to reproduce the behavior

Screenshots and videos

Expected behavior

Environment

Server

• OS: MacOS________
• Java version: Java 12________

Plugins

[16:51:10 INFO]: Plugins (5): BentoBox, Multiverse-Core, PermissionsEx*, PlaceholderAPI*, TAB

BentoBox setup

BentoBox and Addons

[16:49:36 INFO]: Running PAPER 1.13.2.
[16:49:36 INFO]: BentoBox version: 1.9.0-SNAPSHOT-LOCAL
[16:49:36 INFO]: Database: JSON
[16:49:36 INFO]: Loaded Game Worlds:
[16:49:36 INFO]: caveblock-world (CaveBlock): Overworld, Nether, End
[16:49:36 INFO]: Loaded Addons:
[16:49:36 INFO]: CaveBlock 1.9.0-SNAPSHOT-b231 (ENABLED)

Configuration

• Database: JSON

Additional context

[16:47:26 INFO]: 
  ____             _        ____
 |  _ \           | |      |  _ \             by tastybento and Poslovitch
 | |_) | ___ _ __ | |_ ___ | |_) | _____  __  2017 - 2019
 |  _ < / _ \ '_ \| __/ _ \|  _ < / _ \ \/ /
 | |_) |  __/ | | | || (_) | |_) | (_) >  <   v1.9.0-SNAPSHOT-LOCAL
 |____/ \___|_| |_|\__\___/|____/ \___/_/\_\  Loaded in 1536ms.

[16:47:26 INFO]: [BentoBox] Added world CaveBlock (HARD)
[16:47:26 INFO]: [PlaceholderAPI] An update for PlaceholderAPI (v2.10.4) is available at:
[16:47:26 INFO]: [PlaceholderAPI] https://www.spigotmc.org/resources/placeholderapi.6245/
[16:47:26 INFO]: [BentoBox] Loaded Blueprint Bundle 'miner-cave' for CaveBlock
[16:47:26 INFO]: [BentoBox] Loaded Blueprint Bundle 'default' for CaveBlock
[16:47:26 INFO]: [BentoBox] Loaded blueprint 'the nether cave' for CaveBlock
[16:47:26 ERROR]: [org.bukkit.configuration.serialization.ConfigurationSerialization] Could not call method 'public static org.bukkit.inventory.ItemStack org.bukkit.inventory.ItemStack.deserialize(java.util.Map)' of class org.bukkit.inventory.ItemStack for deserialization
java.lang.IllegalArgumentException: Material cannot be null
	at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[patched_1.13.2.jar:git-Paper-626]
	at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:74) ~[patched_1.13.2.jar:git-Paper-626]
	at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:62) ~[patched_1.13.2.jar:git-Paper-626]
	at org.bukkit.inventory.ItemStack.deserialize(ItemStack.java:493) ~[patched_1.13.2.jar:git-Paper-626]
	at jdk.internal.reflect.GeneratedMethodAccessor9.invoke(Unknown Source) ~[?:?]
	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
	at java.lang.reflect.Method.invoke(Method.java:567) ~[?:?]
	at org.bukkit.configuration.serialization.ConfigurationSerialization.deserializeViaMethod(ConfigurationSerialization.java:86) ~[patched_1.13.2.jar:git-Paper-626]
	at org.bukkit.configuration.serialization.ConfigurationSerialization.deserialize(ConfigurationSerialization.java:128) ~[patched_1.13.2.jar:git-Paper-626]
	at org.bukkit.configuration.serialization.ConfigurationSerialization.deserializeObject(ConfigurationSerialization.java:208) ~[patched_1.13.2.jar:git-Paper-626]
	at org.bukkit.configuration.file.YamlConstructor$ConstructCustomObject.construct(YamlConstructor.java:39) ~[patched_1.13.2.jar:git-Paper-626]
	at org.yaml.snakeyaml.constructor.BaseConstructor.constructObjectNoCheck(BaseConstructor.java:204) ~[patched_1.13.2.jar:git-Paper-626]
	at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:193) ~[patched_1.13.2.jar:git-Paper-626]
	at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping2ndStep(BaseConstructor.java:453) ~[patched_1.13.2.jar:git-Paper-626]
	at org.yaml.snakeyaml.constructor.SafeConstructor.constructMapping2ndStep(SafeConstructor.java:184) ~[patched_1.13.2.jar:git-Paper-626]
	at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping(BaseConstructor.java:434) ~[patched_1.13.2.jar:git-Paper-626]
	at org.yaml.snakeyaml.constructor.SafeConstructor$ConstructYamlMap.construct(SafeConstructor.java:521) ~[patched_1.13.2.jar:git-Paper-626]
	at org.bukkit.configuration.file.YamlConstructor$ConstructCustomObject.construct(YamlConstructor.java:30) ~[patched_1.13.2.jar:git-Paper-626]
	at org.yaml.snakeyaml.constructor.BaseConstructor.constructObjectNoCheck(BaseConstructor.java:204) ~[patched_1.13.2.jar:git-Paper-626]
	at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:193) ~[patched_1.13.2.jar:git-Paper-626]
	at org.yaml.snakeyaml.constructor.BaseConstructor.constructDocument(BaseConstructor.java:159) ~[patched_1.13.2.jar:git-Paper-626]
	at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:146) ~[patched_1.13.2.jar:git-Paper-626]
	at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:524) ~[patched_1.13.2.jar:git-Paper-626]
	at org.yaml.snakeyaml.Yaml.load(Yaml.java:437) ~[patched_1.13.2.jar:git-Paper-626]
	at org.bukkit.configuration.file.YamlConfiguration.loadFromString(YamlConfiguration.java:55) ~[patched_1.13.2.jar:git-Paper-626]
	at world.bentobox.bentobox.database.json.adapters.ItemStackTypeAdapter.read(ItemStackTypeAdapter.java:42) ~[?:?]
	at world.bentobox.bentobox.database.json.adapters.ItemStackTypeAdapter.read(ItemStackTypeAdapter.java:21) ~[?:?]
	at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:41) ~[patched_1.13.2.jar:git-Paper-626]
	at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:187) ~[patched_1.13.2.jar:git-Paper-626]
	at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:145) ~[patched_1.13.2.jar:git-Paper-626]
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:129) ~[patched_1.13.2.jar:git-Paper-626]
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:220) ~[patched_1.13.2.jar:git-Paper-626]
	at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:41) ~[patched_1.13.2.jar:git-Paper-626]
	at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:174) ~[patched_1.13.2.jar:git-Paper-626]
	at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:145) ~[patched_1.13.2.jar:git-Paper-626]
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:129) ~[patched_1.13.2.jar:git-Paper-626]
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:220) ~[patched_1.13.2.jar:git-Paper-626]
	at com.google.gson.Gson.fromJson(Gson.java:887) ~[patched_1.13.2.jar:git-Paper-626]
	at com.google.gson.Gson.fromJson(Gson.java:825) ~[patched_1.13.2.jar:git-Paper-626]
	at world.bentobox.bentobox.managers.BlueprintClipboardManager.loadBlueprint(BlueprintClipboardManager.java:107) ~[?:?]
	at world.bentobox.bentobox.managers.BlueprintsManager.loadBlueprints(BlueprintsManager.java:301) ~[?:?]
	at world.bentobox.bentobox.managers.BlueprintsManager.lambda$loadBlueprintBundles$5(BlueprintsManager.java:196) ~[?:?]
	at org.bukkit.craftbukkit.v1_13_R2.scheduler.CraftTask.run(CraftTask.java:84) ~[patched_1.13.2.jar:git-Paper-626]
	at org.bukkit.craftbukkit.v1_13_R2.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:52) ~[patched_1.13.2.jar:git-Paper-626]
	at com.destroystokyo.paper.ServerSchedulerReportingWrapper.run(ServerSchedulerReportingWrapper.java:22) ~[patched_1.13.2.jar:git-Paper-626]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?]
	at java.lang.Thread.run(Thread.java:835) [?:?]
[16:47:26 INFO]: [BentoBox] Loaded blueprint 'the cave' for CaveBlock
[16:47:26 INFO]: [BentoBox] Loaded blueprint 'the end cave' for CaveBlock
[16:47:26 INFO]: [BentoBox] Loaded blueprint 'miner's cave' for CaveBlock
[16:47:26 INFO]: [BentoBox] All blueprints loaded.
[16:47:27 INFO]: [PlaceholderAPI] 163 placeholder expansions are available on the cloud.
[16:47:27 INFO]: [BentoBox] Downloading data from GitHub...
[16:47:27 INFO]: [BentoBox] Updating the Catalog...
[16:47:27 INFO]: [BentoBox] Updating Contributors information...
[16:47:27 INFO]: [BentoBox] Gathering contribution data for: BentoBoxWorld/BentoBox
[16:47:28 INFO]: [BentoBox] Gathering contribution data for: BentoBoxWorld/CaveBlock
[16:47:28 INFO]: [BentoBox] Successfully downloaded data from GitHub.

[tastybento]

This is due to 1.14 material SWEET_BERRIES being in the blueprint. When it is loaded as an ItemStack in 1.13.2 it throws an error that cannot be caught. I'll add code to verify the material is valid and if not, just supply AIR.