Unable to 'Play' certain media

I have a series call Utopia, downloaded from web…certain episodes won’t allow me to press play button; acts like the episodes are invisible to player. Pressing play does nothing, I do hear the click when enabled. But nothing happens.

Using Firestick & Jellyfin app.

Thx.

P.S. Had this happen with S1 of Airwolf earlier and it now works…remember how you fixed it?

Bill