The log files are displayed in the config menu.
FreshRSS logs are located in:
./FreshRSS/data/users/*/log.txt./FreshRSS/data/users/_/log.txtMore logs can be generated by enabling 'environment' => 'development' (default: 'production'), in ./FreshRSS/data/config.php
If there is an 'Application Problem' or 'Fatal Error', then a HTTP 500 error message is shown with more information.
A typical problem is wrong file permissions in the ./FreshRSS/data/ folder so make sure the Web server can write there and in sub-directories.
Adapt names and paths according to your local setup.
docker logs -f freshrssjournalctl -xeu apache2 and if you are using php-fpm: journalctl -xeu php-fpm/var/log/apache2/ or similar/var/log/syslog, or if using systemd: sudo journalctl -xeRunning the feed update script (with the same user and PHP version as your Web server) might provide other hints, e.g.: sudo -u www-data /usr/bin/php ./FreshRSS/app/actualize_script.php
see: Report a bug