When i restarted my server, and i type in any command including pex or permissionsex happened an internal error and in the console it said "null 02.12 15:08:49 [Server] INFO org.bukkit.command.CommandException: Cannot execute command 'pex' in plugin PermissionsEx v1.23.4 - plugin is disabled. 02.12 15:08:49 [Server] INFO at org.bukkit.command.PluginCommand.execute(PluginCommand.java:37) ~[craftbukkit_1.14.4.jar:git-Bukkit-12386dd] 02.12 15:08:49 [Server] INFO at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:148) ~[craftbukkit_1.14.4.jar:git-Bukkit-12386dd] 02.12 15:08:49 [Server] INFO at org.bukkit.craftbukkit.v1_14_R1.CraftServer.dispatchCommand(CraftServer.java:689) ~[craftbukkit_1.14.4.jar:git-Bukkit-12386dd] 02.12 15:08:49 [Server] INFO at net.minecraft.server.v1_14_R1.PlayerConnection.handleCommand(PlayerConnection.java:1590) ~[craftbukkit_1.14.4.jar:git-Bukkit-12386dd] 02.12 15:08:49 [Server] INFO at net.minecraft.server.v1_14_R1.PlayerConnection.a(PlayerConnection.java:1444) ~[craftbukkit_1.14.4.jar:git-Bukkit-12386dd] 02.12 15:08:49 [Server] INFO at net.minecraft.server.v1_14_R1.PacketPlayInChat.a(SourceFile:37) ~[craftbukkit_1.14.4.jar:git-Bukkit-12386dd]"