关于使用vee-validate3.0的length一直出错的问题

问题描述：

请问一下使用vee-validate3.0的length使用一直报错，为什么？怎么解决？

相关截图：

相关代码：

<div class="layui-form-item">
                  <label
                    for="L_pass"
                    class="layui-form-label"
                  >密码</label>
                  <ValidationProvider
                    rules="required|max:6"
                    v-slot="{ errors }"
                  >
                  <div class="layui-input-inline">
                    <input
                      type="password"
                      name="password"
                      placeholder="请输入密码"
                      autocomplete="off"
                      class="layui-input"
                      v-model="psw"
                    >
                  </div>
                  <div class="layui-form-mid mp-error-msg">{{ errors[0] }}</div>
                  </ValidationProvider>
                </div>

git地址如下

https://gitee.com/my-is-a-fish/mp.git

请老师解答