Fix

framework/Argument.js

@@ -5,17 +5,17 @@ module.exports = class Argument {
 		Object.defineProperty(this, 'client', { value: client });
 
 		this.key = options.key.toLowerCase();
-		this.label = options.label || null;
+		this.label = typeof options.label === 'undefined' ? null : options.label;
 		this.typeID = options.type.toLowerCase();
-		this.min = options.min || null;
-		this.max = options.max || null;
-		this.oneOf = options.oneOf || null;
-		this.default = options.default || null;
+		this.min = typeof options.min === 'undefined' ? null : options.min;
+		this.max = typeof options.max === 'undefined' ? null : options.max;
+		this.oneOf = typeof options.oneOf === 'undefined' ? null : options.oneOf;
+		this.default = typeof options.default === 'undefined' ? null : options.default;
 		this.infinite = options.infinite || false;
 		this.avatarSize = options.avatarSize || 2048;
-		this.validator = options.validate || null;
-		this.parser = options.parse || null;
-		this.emptyChecker = options.isEmpty || null;
+		this.validator = typeof options.validate === 'undefined' ? null : options.validate;
+		this.parser = typeof options.parse === 'undefined' ? null : options.parse;
+		this.emptyChecker = typeof options.isEmpty === 'undefined' ? null : options.isEmpty;
 	}
 
 	get type() {

framework/Dispatcher.js

@@ -58,11 +58,11 @@ module.exports = class CommandDispatcher {
 			}
 			const parsedArg = parsed._[i]?.toString();
 			if (arg.isEmpty(parsedArg, msg, arg)) {
-				if (arg.default !== null) {
+				if (arg.default === null) {
+					return `The "${arg.label || arg.key}" argument is required.`;
+				} else {
 					finalResult[arg.key] = typeof arg.default === 'function' ? arg.default(msg) : arg.default;
 					continue;
-				} else {
-					return `The "${arg.label || arg.key}" argument is required.`;
 				}
 			}
 			const valid = await arg.validate(parsedArg, msg, arg);