Nagios Support Forum

We also have CentOS 7. I need to find some time to migrate away.

Thanks @MortenSickel !

Your solution fixed it. There are still some quirks, for instance the "Home" page is completely blank, but the rest of the webpages "Services", "Hosts", etc. all are accessible again.

When something like that happens, your best bet is to have a look at the web server error logs. On RHEL/CentOS/Oracle distributions they're most likely under /var/log/php-fpm. On Debian and Ubunto they're most likely under /var/log/apache2. If you attach a snippet of the end of the error log, we'll...

I updated Nagios Core from version 4.5.7 to 4.5.9 by following the instructions at https://assets.nagios.com/downloads/nagioscore/docs/nagioscore/4/en/upgrading.html. However, after the update, I cannot access the Nagios web interface. It returns an HTTP Error 500 "This page isn't working and c...