That is not a fix but rather a long-known workaround.
Even though the right side is blacked out, as long as you keep moving to to the right the upcoming portions of the game board reveal themselves out of the darkness UNTIL you get near the end of the game board. That's when it stops revealing any more of the board and you can't move forward without going into the darkness and, no doubt, hitting a mine.
The workaround is to go as far as you can at 100% then, near the end when no more board will reveal itself, you zoom in and then the board comes into view, albeit at an agonizing and annoying close-up magnitude. If you have a wheel on your mouse, you just roll the wheel to zoom in or out.
Nevertheless, that is still not enough to make the game worth continuing to play. I have not played the game for several months, whenever I upgraded to Windows 10 and realized that the low-lives at Microsoft could care less about us and were not going to lift a finger to fix the damage they had done and even worse, the great disservice they have done to people who have been playing Minesweeper for decades.
If you can stand using the work around then by all means enjoy yourself. I think a lot of people (probably most long-time Minesweeper Adventure and Treasure Hunt players) just use the workaround to get out of the game without stepping on a mine and then stop playing, maintaining their levels and resources, in hopes that during their lifetimes the developers at Microsoft will get their thumbs out of their **** and fix the blackout issue.