I'm using Opencart version 2.2.0.0. If I try to install an extension (in this case, this one), I get the following error:

The progress locks at "extracting files". The error logs show nothing for today's date. The FTP details are configured correctly. The website is hosted on Aruba, which filters FTP access by IP, but the filter was temporarily deactivated.
What can I do? Thanks in advance.