I’ve already tried rebooting it a few times, but it gives me the same error.
I didn’t touch the repository in a few months, so is nothing “new” in there. The app was working fine a few weeks ago.
Finally, it was an issue with the paths in the repo in Github.
Apparently, they were changed (I have no idea why or when), and I was using a “total path” (the full web address), when the best practice (I think) is to use a “relative path” like this: “./OGUC_2016_faiss/”.