Issue with creating and editing playlist

Hi there,

I’m fairly new to WP and FV player, so please bear with me.

Last evening, FV flowplayer was working for setting up playlist, including automatic detection for quality switching, yaye!

But today, whilst the playlist shortcode is still working and the playlist is still playing, I can no longer create new playlists or edit existing ones. I can clone them, but I can’t do anything else. I get the infinite wait, as I have uploaded in the picture for your reference.

However, we have a staging site as well, and when repeating the steps there it appears to properly launch the playlist edit window and I can set things up there accordingly.

This is frustrating as I was hoping to get unto populating more play lists today, but I can’t do so on the main site. Can somebody please assist me with this problem?

Using WP 5.1.

( System Info removed )

FV-player-issue