BlockCommand - Run commands during block interactions

/bcmd add
[21:12:43] [Server thread/INFO] [nucleus]: Server 执行指令: /bcmd add
[21:12:43] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Error occurred while executing command: No value present
[21:12:43] [Server thread/ERROR] [Sponge]: Error occurred while executing command ‘bcmd add’ for source DedicatedServer: No value present
java.util.NoSuchElementException: No value present
at java.util.Optional.get(Unknown Source) ~[?:1.8.0_172]
at net.mineyourmind.blockcommand.commands.AddCommand.execute(AddCommand.java:23) ~[AddCommand.class:?]
at org.spongepowered.api.command.args.ChildCommandElementExecutor.execute(ChildCommandElementExecutor.java:255) ~[ChildCommandElementExecutor.class:1.12.2-2705-7.1.0-BETA-3206]
at org.spongepowered.api.command.spec.CommandSpec.process(CommandSpec.java:388) ~[CommandSpec.class:1.12.2-2705-7.1.0-BETA-3206]
at org.spongepowered.api.command.dispatcher.SimpleDispatcher.process(SimpleDispatcher.java:341) ~[SimpleDispatcher.class:1.12.2-2705-7.1.0-BETA-3206]
at org.spongepowered.common.command.SpongeCommandManager.process(SpongeCommandManager.java:328) [SpongeCommandManager.class:1.12.2-2705-7.1.0-BETA-3206]
at net.minecraft.command.ServerCommandManager.func_71556_a(SourceFile:1083) [dh.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71333_ah(DedicatedServer.java:432) [nz.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:397) [nz.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_172]
/bcmd add