14 hrs is pretty intense - how big a site and what size EC2 instance? Are you watching the generated directory to see that it is actually processing/increasing in size during those 14 hrs?
I’d aim for < 1 hr, even for massive sites. For that 14 hrs, you could be better served by spinning up a powerful instance, cloning site and running with big resources, probably coming out at similar or lesser cost in instance hours - just depends how much you value your time to do it manually or script it up.
The wp2static repo hasn’t had any official releases for a while, but you can definitely use it from master branch from GitHub. In the name of your plugin folder, it seems like you’ve downloaded a ZIP from GitHub, which is not a compiled, ready-to-run plugin, so as @john-shaffer mentioned, you’d need to run
composer install. I think you’ll also be best to ensure the plugin dir is named
wp2static-master, but maybe can get away with that for now.
If you want to try what forked from v6 of the plugin, it’s now named Static HTML Output and you can get a ready to run plugin from https://github.com/WP2Static/static-html-output-plugin/files/4822705/static-html-output-plugin-6.6.21.zip
Big sites are really fun to do for me, so I’d love to see you get this working a lot quicker. The “more modern” WP2Static includes a lot of caching options which will be much more useful for large sites, especially when you need to re-run after making changes, as it should only crawl/process changed files.
Unfortunately, I’ve been out of action for a while with some mental health issues, so fallen behind in support and development, otherwise I’d be volunteering more to directly help you / login to remote site, etc. On that note, for big sites, you may also be better served to take a clone and run the export from a local computer, assuming a lot more resources than an EC2 instance.
Please keep updating with any progress/issues. I can’t promise how quickly any of us can respond here - but there’s a chance someone else will have dealt with similar issues.