Region 1 disc is incompatible with this player

This player is incompatible with the region marking of this disk.
I had previously played this with my player.
What is wrong?

Can you test if it works with this older version?
https://github.com/clsid2/mpc-hc/releases/download/1.9.7/MPC-HC.1.9.7.x64.zip

JWS042960 wrote:This player is incompatible with the region marking of this disk.
I had previously played this with my player.
What is wrong?

If you're playing it with a physical drive, it may have been locked to a different region (you can have up to 5 changes).

MPC-HC can bypass the region check. But it's method may not work properly for everyone.

So please test the older version, which has slightly different bypass implementation.

Is your drive set to Region 1, or is it region free?
Do you know if this disc uses Region Codec Extended (RCE) protection?