что означает данная ошибка в логах Minecraft
[14:46:03 INFO]: | Prison | Error trying to build Prison backup file: /home/container/plugins/Prison/backups/prison_2023-05-08_14-46_v3.3.0-alpha.14b_upgrade.zip [Cannot read the array length because "<local6>" is null]
[14:46:03 WARN]: java.lang.NullPointerException: Cannot read the array length because "<local6>" is null
[14:46:03 WARN]: at tech.mcprison.prison.util.PrisonStatsUtil.listFiles(PrisonStatsUtil.java:213)
[14:46:03 WARN]: at tech.mcprison.prison.util.PrisonStatsUtil.getSupportSubmitRanksData(PrisonStatsUtil.java:107)
[14:46:03 WARN]: at tech.mcprison.prison.backups.PrisonBackups.backupReportRanksData(PrisonBackups.java:327)
[14:46:03 WARN]: at tech.mcprison.prison.file.ZipFileIO.writeToZipFileBackups(ZipFileIO.java:69)
[14:46:03 WARN]: at tech.mcprison.prison.backups.PrisonBackups.startBackup(PrisonBackups.java:206)
[14:46:03 WARN]: at tech.mcprison.prison.backups.PrisonBackups.serverStartupVersionCheck(PrisonBackups.java:140)
[14:46:03 WARN]: at tech.mcprison.prison.spigot.SpigotPrison.onEnableStartup(SpigotPrison.java:398)
[14:46:03 WARN]: at tech.mcprison.prison.spigot.SpigotPrison.onEnable(SpigotPrison.java:272)
[14:46:03 WARN]: at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263)
[14:46:03 WARN]: at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:370)
[14:46:03 WARN]: at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:500)
[14:46:03 WARN]: at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugin(CraftServer.java:518)
[14:46:03 WARN]: at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugins(CraftServer.java:432)
[14:46:03 WARN]: at net.minecraft.server.v1_16_R3.MinecraftServer.loadWorld(MinecraftServer.java:596)
[14:46:03 WARN]: at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:309)
[14:46:03 WARN]: at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1074)
[14:46:03 WARN]: at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:293)
[14:46:03 WARN]: at java.base/java.lang.Thread.run(Thread.java:831)
[14:46:03 INFO]: | Prison | Error trying to build Prison backup file: /home/container/plugins/Prison/backups/prison_2023-05-08_14-46_v3.3.0-alpha.14b_upgrade.zip [Cannot read the array length because "<local6>" is null]
[14:46:03 WARN]: java.lang.NullPointerException: Cannot read the array length because "<local6>" is null
[14:46:03 WARN]: at tech.mcprison.prison.util.PrisonStatsUtil.listFiles(PrisonStatsUtil.java:213)
[14:46:03 WARN]: at tech.mcprison.prison.util.PrisonStatsUtil.getSupportSubmitRanksData(PrisonStatsUtil.java:107)
[14:46:03 WARN]: at tech.mcprison.prison.backups.PrisonBackups.backupReportRanksData(PrisonBackups.java:327)
[14:46:03 WARN]: at tech.mcprison.prison.file.ZipFileIO.writeToZipFileBackups(ZipFileIO.java:69)
[14:46:03 WARN]: at tech.mcprison.prison.backups.PrisonBackups.startBackup(PrisonBackups.java:206)
[14:46:03 WARN]: at tech.mcprison.prison.backups.PrisonBackups.serverStartupVersionCheck(PrisonBackups.java:140)
[14:46:03 WARN]: at tech.mcprison.prison.spigot.SpigotPrison.onEnableStartup(SpigotPrison.java:398)
[14:46:03 WARN]: at tech.mcprison.prison.spigot.SpigotPrison.onEnable(SpigotPrison.java:272)
[14:46:03 WARN]: at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263)
[14:46:03 WARN]: at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:370)
[14:46:03 WARN]: at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:500)
[14:46:03 WARN]: at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugin(CraftServer.java:518)
[14:46:03 WARN]: at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugins(CraftServer.java:432)
[14:46:03 WARN]: at net.minecraft.server.v1_16_R3.MinecraftServer.loadWorld(MinecraftServer.java:596)
[14:46:03 WARN]: at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:309)
[14:46:03 WARN]: at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1074)
[14:46:03 WARN]: at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:293)
[14:46:03 WARN]: at java.base/java.lang.Thread.run(Thread.java:831)