Remember, the answer you provide today is not just for the OP. It is for everyone else who happens to land on it via some search engine link or other method in the future.

Adding an explanation [like you did here][1] improves the answer considerably and makes it more useful to the OP and anyone else who might subsequently find it. It explains what caused the problem, this will hopefully lead to a better understanding than 'here's a fix'.
  
We should be seeking to educate people rather than feeding them and better yet we should seek to teach people to educate themselves.  


>This website is for professionals and the users are required to have a good understanding of what they are asking.

We won't go there, this is demonstrably (and unfortunately) not true.

 


  [1]: https://serverfault.com/a/622849/9517