RT database inaccessible

Hi all. We recently installed an RT 4.4.4 on a Debian 11. After a few configurations, I dropped its original db and then imported the db of RT 4.4.2 (which was our current RT on a different server) via MySQL Workbench. We were doing an upgrade from 4.4.2 to 4.4.4. After importing successfully, upon accessing RT on the browser, it shows an error: Database inaccessible; contact the RT administrator (support). But the db credentials on RT_SiteConfig are correct, and the newly imported db was accessible via MYSQL workbench and MYSQL command line. Kindly help. Thanks in advance!


What do you see in the web server error log?