Plex is not reachable We are unable to connect to plex.tv at this time. Please try again later

Hello Guys!

I’m new to HA. I’m running supervised on Debian. Installed recently the Plex addon from the “store”. The addon starts up normally but seems like there is some sort of network glitch.
When opening the plex URL on the box i get the following message:
We are unable to connect to plex.tv at this time. Please try again later.

I was trying the figure out what might be the problem but no luck yet. Any ideas how to sort this out ?

Many thanks!