无法解决：未捕获TypeError：无法在'Node'上执行'appendChild'：参数1不是'Node'类型

I have tried looking for the answer in the similar questions but I am not able to resolve, I know the error is due to the jquery ,DOM conversion but I am not able to fix the issue, I have tried to use append(); instead of appendChild();. I am trying to implement drag and drop functionality. I have tried looking for the answer in the simi