Hi, when i try to install way of the samurai 4 i get an error at installation that you can see in my picture (sorry it's in french)
What can be done to resolve it?
on a side not, it keeps redownloading 71.5 MB over and over and fail to install everytime with the same error above.

I'm not sure if it is correct to try to answer this now but, reading this post makes me wonder.

Try downloading the backup file and installing it outside GOG galaxy.See if it works