Command cannot run on command blocks

[SonMooSans]

I made a mod that follows players to send message as custom display name using command:

/assend

It is working when I execute the command, but when I execute this command by command block, nothing happened

the command block output is 

  Quote

[XX:XX:XX] /assend Name helloworld <--[HERE]

Expand  

Java code of that command:

  static int SendAs(CommandContext<CommandSource> commandContext) throws CommandSyntaxException
  {
  String Name = StringArgumentType.getString(commandContext, "Name");
  String Input = MessageArgument.getMessage(commandContext, "Input").getUnformattedComponentText();
  TranslationTextComponent finalText = new TranslationTextComponent("chat.type.announcement",
                  Name, input);
  commandContext.getSource().getServer().getPlayerList().func_232641_a_(finalText, ChatType.SYSTEM, Util.DUMMY_UUID);
  return 1;
  }

How can i fix it?

[SonMooSans]

package minecrafttest.commands;

import com.mojang.brigadier.Command;
import com.mojang.brigadier.CommandDispatcher;
import com.mojang.brigadier.arguments.IntegerArgumentType;
import com.mojang.brigadier.arguments.StringArgumentType;
import com.mojang.brigadier.builder.LiteralArgumentBuilder;
import com.mojang.brigadier.context.CommandContext;
import com.mojang.brigadier.exceptions.CommandSyntaxException;
import net.minecraft.command.CommandSource;
import net.minecraft.command.Commands;
import net.minecraft.command.FunctionObject;
import net.minecraft.command.arguments.MessageArgument;
import net.minecraft.entity.Entity;
import net.minecraft.util.Util;
import net.minecraft.util.text.ChatType;
import net.minecraft.util.text.ITextComponent;
import net.minecraft.util.text.StringTextComponent;
import net.minecraft.util.text.TranslationTextComponent;

import java.util.Collection;
import java.util.Random;
import java.util.RandomAccess;

import static net.minecraft.util.math.MathHelper.clamp;
public class sayCommand {
  public static void register(CommandDispatcher<CommandSource> dispatcher) {
    LiteralArgumentBuilder<CommandSource> mbequoteCommand
            = Commands.literal("assend")
            .requires((commandSource) -> commandSource.hasPermissionLevel(4))
            .then(Commands.argument("Name", StringArgumentType.string())
                    .then(Commands.argument("Input", MessageArgument.message())
                            .executes(sayCommand::SendAs)

                    )
            );


    dispatcher.register(mbequoteCommand);
  }
  static int SendAs(CommandContext<CommandSource> commandContext) throws CommandSyntaxException
  {
    String Name = StringArgumentType.getString(commandContext, "Name");
    String input = MessageArgument.getMessage(commandContext, "Input").getUnformattedComponentText();
    TranslationTextComponent finalText = new TranslationTextComponent("chat.type.announcement",
            Name, input);
    commandContext.getSource().getServer().getPlayerList().func_232641_a_(finalText, ChatType.SYSTEM, Util.DUMMY_UUID);
    return 1;
  }
}

 

Edited June 29, 2021 by SonMooSans

[SonMooSans]

I think I found the problem, it works after I removed this:

.requires((commandSource) -> commandSource.hasPermissionLevel(4))

How can I let the command blocks run it when Require Permission Level is 4?