I got an email with an exclusive discount but I can't claim it because the game's store page won't load.

I can see all the DLC pages but not the main game's page.

I am located in Japan but I seem to remember being able to access the page a few months ago when it was on sale.

Judging by https://www.gog.com/forum/general/regional_locked_games_on_gog_v2?search=dying it's been blocked in Japan since at least 2017.

I figured maybe it's blocked there because the Night Hunter doesn't have enough tentacles.