/cmi getbook Command error and cannot be used

[polang233]

Description of Issue

Testing with default configuration still yields errors
I remember the first few versions were fine, but there were issues during testing in version 9.7.4.9. Even after updating to the latest version, the problem persists

Version Information

[03:46:50 INFO]: --------------------------------------------------
[03:46:50 INFO]: CMI版本:9.7.5.0 MySQL-> 9.7.4.9
[03:46:50 INFO]: CMILib版本:1.5.1.0
[03:46:50 INFO]: 服务器版本:Paper(1620) 1.12.2-R0.1-SNAPSHOT-
[03:46:50 INFO]: CMI经济系统:已启用Vault版本:1.7.3-b131(CMIEInjector)CMI聊天系统:已禁用
[03:46:50 INFO]: 模块 -> 52 已启用 14 已禁用:spawnerProximity, mirror, tablist, elytraExploit, skin, dynamicSigns, playerChatTag, schedule, chatBubble, ranks, votifier, spawnerCharge, homeInteractions, totemBehavior
[03:46:50 INFO]: --------------------------------------------------

Errors

[03:42:36 INFO]: Polang_ issued server command: /cmi getbook rules
[03:42:36 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'cmi' in plugin CMI v9.7.5.0
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[patched_1.12.2.jar:git-Paper-1620]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:152) ~[patched_1.12.2.jar:git-Paper-1620]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:685) ~[patched_1.12.2.jar:git-Paper-1620]
        at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1492) ~[patched_1.12.2.jar:git-Paper-1620]
        at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1297) ~[patched_1.12.2.jar:git-Paper-1620]
        at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) ~[patched_1.12.2.jar:git-Paper-1620]
        at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:5) ~[patched_1.12.2.jar:git-Paper-1620]
        at net.minecraft.server.v1_12_R1.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:14) ~[patched_1.12.2.jar:git-Paper-1620]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[?:?]
        at java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[?:?]
        at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) ~[patched_1.12.2.jar:git-Paper-1620]
        at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:850) ~[patched_1.12.2.jar:git-Paper-1620]
        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:423) ~[patched_1.12.2.jar:git-Paper-1620]
        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:774) ~[patched_1.12.2.jar:git-Paper-1620]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:666) ~[patched_1.12.2.jar:git-Paper-1620]
        at java.lang.Thread.run(Thread.java:834) [?:?]
Caused by: java.lang.NoSuchMethodError: java.lang.StringBuilder.isEmpty()Z
        at com.Zrips.CMI.Modules.CustomText.CText.convertToBook(CText.java:265) ~[?:?]
        at com.Zrips.CMI.commands.list.getbook.perform(getbook.java:88) ~[?:?]
        at com.Zrips.CMI.commands.CommandsHandler.onCommand(CommandsHandler.java:400) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[patched_1.12.2.jar:git-Paper-1620]
        ... 15 more

Relevant Config Sections

No response

Relevant Plugins

No response

Agreements

• My server is supported by CMI.
• My version of CMI at the time of this report is up to date.
• I have searched the github and asked around before making this report.

[Zrips]

Will be fixed with next update. Tho you should consider upgrading your Java version to have better compatibility with plugins in the future.

[polang233]

Will be fixed with next update. Tho you should consider upgrading your Java version to have better compatibility with plugins in the future.

I have already changed from Java8 to Java11. Directly upgrading to Java17 or above will cause many plugins to have problems in version 1.12.2, while upgrading the server version to 1.12 or above will be more troublesome...... Thank you for reminding me