I have upgrade Librenms from v21.8 to v22.9. After upgrade, my page layout and dashboard are all showing messy. Logo is gone, all dashboard, devices list layout are displaying messy .
OK, let me answer my question. Our Ubuntu server has CIS Compliance. When I updated Librenms, CIS removed js and css files read permission. I found a lot of access deny on apache error logs. The Portal showing correctly after assigning read permission to css and js files.