itch.io

This sounds like your savegame is corrupt (or your game) can you please check in "C:\Users\[your user name]\AppData\LocalLow\Kernis_not_existing_company\Abandoned - A tale of forgotten lives" if a file named output.txt has been generated.
in this file should be the reason for the issue (on the tail end of the file)

What you can also do is switch to the savegame workaround, in the gameplay settings you can switch the "savegame workaround" to "enabled". What this will do is to save your savegames not as files on your PC , but into the registry of your computer.
(this is actually made for MAc/linux systems who have savegame problems)

I hope i could help a bit.