Not able to save the docx file in server

Hello, I am using zoho office integrator in my web application to save the file back to server.

But every time I tried to save file its showing error like this

" There was a problem saving the content. Please export a local copy and try again later."

I am referring this php code for saving the file:

<?php

$tmp_filename = $_FILES['content']['tmp_name'];

$upload_status = move_uploaded_file($tmp_filename, $filepath);