Solution to fix WordPress update failure issue

I was having problem while updating one of my plugin weeks ago, telling me that

Could not create directory. /home//public_html/wp-content/plugins/download-manager Plugin install failed.


Unable to locate WordPress Content directory (wp-content).

By then, I turned to Google for solutions, however, tried every way I got, such as: •1. Remove the plugin and re-install it. •2. […]