NFSW Unable to connect to the Flowplayer Video API (Again).

All plugins are updated. The message below always comes up when trying to access videos in my Flowplayer account.

“Add from Flowplayer Drive.
You have entered an incorrect combination of username and password. Please check your username and password in the settings.”

It happened before and a WordPress Contributor fixed it. Something to do with the API URL but he didn’t show me or explain to me how he fixed API URL problem.