As of Pro Tools 12.7.0 and with Windows 10, this has still not been fixed.
Those of us experiencing this cannot use the Score Editor nor any of the plugins/instruments included with Pro Tools that were developed by AIR.
I just paid my $399 HD annual support fee and I paid $599 for the year that just passed. For someone like me who composes using a lot of MIDI, a nontrivial percent of the Pro Tools product is unusable and has been unusable for over one year.
Not happy about paying through the nose for "support" and something as basic as this is not being addressed for this long!