Issue after upgrading CMSMS to the latest version

[unfriendlywhether]

Hi everyone, I just upgraded my site from CMS Made Simple 2.2.19 to the newest release. After the upgrade, the admin panel works fine, but the frontend only shows a blank page. I tried enabling debug mode, but the error message is very generic and doesn’t point to the root cause.

Has anyone else experienced this issue? Should I start by checking the template, modules, or the config file? Any advice on where to look first would be greatly appreciated.

Thanks in advance!

[DIGI3]

Start by checking the PHP error log, and the admin log. Feel free to share your results. Also include your PHP version, and a list of modules you're using (you can generate a text report in Site Admin > System Informaation).