Jimh I did up and down arrows on the keyboard to get the on-screen display, so I saw subtitles disabled, what I do to enable. Regards.
Push up or down arrow one more time to see if another stream selection is available, if it is, use left or right arrow to select it.
Normally, the layout of stream selection is like this:
Stream 0: Video
Stream 1: Audio: English
Stream 2: Audio: Spanish
...
...
Stream 7: Subtitle: English
Stream 8: Subtitle: Spanish
Stream 9: Subtitle: Disabled
(... ... represent additional audio or subtitle streams).
Pushing up or down arrow would cycle through these selections.