TLDR: 2 save errors, one fixed by creating save folder, other error fixed by changing folder options from read only to giving it full control to all pc users.
I'd like to mention that if anyone is having an issue with the game where it shows 2 errors, upon creating a folder called "save" in your game directory one error will disappear. However, the other error is still shown and it, as well, is saying that the game failed to save "セーフファイルの作成に失敗しました". To solve this issue I changed system locale to Japanese, but what I think actually fixed it is that I changed the folder/file options of the game directory. Right click on the folder where the game is installed, go to properties, uncheck read only, apply, then go to security tab, advanced, change owner, type your account name in the white box and click check names (whatever you named your PC, if someone is very much a newbie and confused just go to C:\Users and see which folder isn't named by something you would see in a windows release on sale, by example a folder named Joseph certainly isn't included in a clean windows release, that would be Joseph's pc name then). When you check names it'll confirm your pc and then click ok, apply again, click OK. Now you're back to the previous properties window, click edit, give everything you can full control over the game folder, apply and click ok. See if the game works. If it doesn't, see if it works with system locale on japanese. If it doesn't again, go back to the security, advanced tab and click add, once again add your PC name by clicking select principal and checking the names. Click ok, then check all (even on show advanced permissions, though it should be automatically selected once you check full control) the basic permissions boxes, except the "Only apply these permission" click ok. Once again, apply, click ok. Go back now check mark the "replace all child object permission entries" apply and click ok. (check if all of your group usernames on the security tab have full control, I'm quite sure not all of them need full control but I did it for all just in case). Click ok and try to run the game.
