Try testing your disc with a program such as that recommended by oojason above. If you use vlc (which is free and available as portable software - don’t know about other programs), then be aware that you may not get the main movie on njvc’s Blurays to play on your PC. But all extras and menus should work fine with vlc. My disc works fine in all respects in my standalone Sony Bluray player from about 2008.
Alright, I put my burnt blu-ray back into my burner and tried playing it with both vlc and leawo. What suprised me was that it actually played just like my iso file. Made me wonder whether or not it was the discs, or some sort of DRM problem on the PS4 and my old panasonic player. I was thinking this because I remember both being able to play the raw AVCHD video file that was like 8gb from HARMY that I burned into other discs.