Updated my PaperMC server from 1.21.11 to 26.1.2 now that the BETA branch is out. And ChatColor2 v1.16.1 gets disabled on server startup.
[Server thread/ERROR]: Error occurred while enabling ChatColor2 v1.16.1 (Is it up to date?)
java.lang.NumberFormatException: multiple points
at java.base/jdk.internal.math.FloatingDecimal.checkMultiplePoints(FloatingDecimal.java:2308) ~[?:?]
at java.base/jdk.internal.math.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1923) ~[?:?]
at java.base/jdk.internal.math.FloatingDecimal.parseFloat(FloatingDecimal.java:122) ~[?:?]
at java.base/java.lang.Float.parseFloat(Float.java:597) ~[?:?]
at ChatColor2-1.16.1.jar//com.sulphate.chatcolor2.utils.CompatabilityUtils.init(CompatabilityUtils.java:27) ~[?:?]
at ChatColor2-1.16.1.jar//com.sulphate.chatcolor2.main.ChatColor.setupObjects(ChatColor.java:144) ~[?:?]
at ChatColor2-1.16.1.jar//com.sulphate.chatcolor2.main.ChatColor.onEnable(ChatColor.java:77) ~[?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:279) ~[paper-api-26.1.2.build.49-beta.jar:?]
at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.enablePlugin(PaperPluginInstanceManager.java:207) ~[paper-26.1.2.jar:26.1.2-49-7799bf2]
at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.enablePlugin(PaperPluginManagerImpl.java:109) ~[paper-26.1.2.jar:26.1.2-49-7799bf2]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:520) ~[paper-api-26.1.2.build.49-beta.jar:?]
at org.bukkit.craftbukkit.CraftServer.enablePlugin(CraftServer.java:637) ~[paper-26.1.2.jar:26.1.2-49-7799bf2]
at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:594) ~[paper-26.1.2.jar:26.1.2-49-7799bf2]
at net.minecraft.server.MinecraftServer.initPostWorld(MinecraftServer.java:680) ~[paper-26.1.2.jar:26.1.2-49-7799bf2]
at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:386) ~[paper-26.1.2.jar:26.1.2-49-7799bf2]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1301) ~[paper-26.1.2.jar:26.1.2-49-7799bf2]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:304) ~[paper-26.1.2.jar:26.1.2-49-7799bf2]
at java.base/java.lang.Thread.run(Thread.java:1474) ~[?:?]
[Server thread/INFO]: [ChatColor2] Disabling ChatColor2 v1.16.1
[Server thread/ERROR]: Error occurred while disabling ChatColor2 v1.16.1
java.lang.NullPointerException: Cannot invoke "com.sulphate.chatcolor2.gui.GuiManager.closeOpenGuis()" because "this.guiManager" is null
at ChatColor2-1.16.1.jar//com.sulphate.chatcolor2.main.ChatColor.onDisable(ChatColor.java:135) ~[?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:285) ~[paper-api-26.1.2.build.49-beta.jar:?]
at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.disablePlugin(PaperPluginInstanceManager.java:242) ~[paper-26.1.2.jar:26.1.2-49-7799bf2]
at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.disablePlugin(PaperPluginManagerImpl.java:114) ~[paper-26.1.2.jar:26.1.2-49-7799bf2]
at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:550) ~[paper-api-26.1.2.build.49-beta.jar:?]
at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.enablePlugin(PaperPluginInstanceManager.java:211) ~[paper-26.1.2.jar:26.1.2-49-7799bf2]
at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.enablePlugin(PaperPluginManagerImpl.java:109) ~[paper-26.1.2.jar:26.1.2-49-7799bf2]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:520) ~[paper-api-26.1.2.build.49-beta.jar:?]
at org.bukkit.craftbukkit.CraftServer.enablePlugin(CraftServer.java:637) ~[paper-26.1.2.jar:26.1.2-49-7799bf2]
at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:594) ~[paper-26.1.2.jar:26.1.2-49-7799bf2]
at net.minecraft.server.MinecraftServer.initPostWorld(MinecraftServer.java:680) ~[paper-26.1.2.jar:26.1.2-49-7799bf2]
at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:386) ~[paper-26.1.2.jar:26.1.2-49-7799bf2]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1301) ~[paper-26.1.2.jar:26.1.2-49-7799bf2]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:304) ~[paper-26.1.2.jar:26.1.2-49-7799bf2]
at java.base/java.lang.Thread.run(Thread.java:1474) ~[?:?]```
Updated my PaperMC server from 1.21.11 to 26.1.2 now that the BETA branch is out. And ChatColor2 v1.16.1 gets disabled on server startup.