logs here https://paste.ubuntu.com/p/7DRV3jNcrp/
It seems there's an issue with installing games from GOG. I have the same "goginstaller not found" error pop up when installing various games (Crimsonland for example).
I had the same error until I download the last git version.
@legluondunet I'm using the latest version:

For now please use master version of Lutris. We will make a new release with a fix soon.
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For now please use master version of Lutris. We will make a new release with a fix soon.