Nagios Support Forum

Hi, I found out what was wrong. So I post the solution if it helps other people. I saw in the apache's error.log (/var/log/apache2/error.log) this line: [php7:error] [pid 1239] [client 192.168.1.62:64134] PHP Fatal error: Uncaught Error: Call to undefined function simplexml_load_string() in /usr/loc...

Hi, I'm new using nagios. I'm configuring a test nagios environment with NRDP. I'm using an Ubuntu 18.04 machine, nagios 4.4.1, nagios plugins 2.2.1 and nrdp 1.5.1. I followed several tutorials and everything seems to be up and running. The issue I'm experiencing is that I'm not able to perform a si...