Arthur Kasirye is an expert in WordPress, Elementor, and digital marketing. He is introducing an online meetup about common WordPress errors and how to troubleshoot them. The document provides guidelines for the meetup and then summarizes common WordPress errors like 404 errors, White Screen of Death, 500 errors and malware/backdoors. It also provides tips for repairing a hacked WordPress site, which include backing up files and databases, locating the hack, cleaning malware, checking user permissions, and using a website firewall for protection.