[PrimeSeller] Plugin PrimeSeller v2.1.6 generated an exception while executing task 42
java.lang.NullPointerException: Nodes must be provided.
at org.yaml.snakeyaml.nodes.NodeTuple.<init>(NodeTuple.java:28) ~[patched_1.12.2.jar:git-Paper-1618]
at org.yaml.snakeyaml.representer.BaseRepresenter.representMapping(BaseRepresenter.java:163) ~[patched_1.12.2.jar:git-Paper-1618]
at org.yaml.snakeyaml.representer.SafeRepresenter$RepresentMap.representData(SafeRepresenter.java:314) ~[patched_1.12.2.jar:git-Paper-1618]
at org.yaml.snakeyaml.representer.BaseRepresenter.representData(BaseRepresenter.java:94) ~[patched_1.12.2.jar:git-Paper-1618]
at org.yaml.snakeyaml.representer.BaseRepresenter.represent(BaseRepresenter.java:64) ~[patched_1.12.2.jar:git-Paper-1618]
at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:306) ~[patched_1.12.2.jar:git-Paper-1618]
at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:270) ~[patched_1.12.2.jar:git-Paper-1618]
at org.yaml.snakeyaml.Yaml.dump(Yaml.java:245) ~[patched_1.12.2.jar:git-Paper-1618]
at org.bukkit.configuration.file.YamlConfiguration.saveToString(YamlConfiguration.java:38) ~[patched_1.12.2.jar:git-Paper-1618]
at org.bukkit.configuration.file.FileConfiguration.save(FileConfiguration.java:68) ~[patched_1.12.2.jar:git-Paper-1618]
at ru.spigotmc.destroy.primeseller.configurations.Data.saveMaterial(Data.java:31) ~[?:?]
at ru.spigotmc.destroy.primeseller.menu.SellerMenu.createUnLimItems(SellerMenu.java:43) ~[?:?]
at ru.spigotmc.destroy.primeseller.utils.Updater.lambda$startUnLim$1(Updater.java:112) ~[?:?]
at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:64) ~[patched_1.12.2.jar:git-Paper-1618]
at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:52) ~[patched_1.12.2.jar:git-Paper-1618]
at com.destroystokyo.paper.ServerSchedulerReportingWrapper.run(ServerSchedulerReportingWrapper.java:22) ~[patched_1.12.2.jar:git-Paper-1618]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?]
at java.lang.Thread.run(Thread.java:829) [?:?]