Paul
@paaljoachim You shouldn't need to do anything manually. You should be able to download the master (https://github.com/peiche/fluidbox-wp/archive/master.zip) and install that with WordPress's built-in plugin installer. As for the plugin functionality,...
+1 Negative values are essential for building layouts.
Alternatively, you can run `npm install --legacy-peer-deps` to leave the React versions as they are in this repo. That's what I did, and it installed everything successfully.