Crashed with Fatal Error

This is exactly what I needed. Unfortunately, it didn’t work — or rather, it crashed with two notices: Undefined index ‘SERVER_ADDR’ and undefined index ‘SERVER_ADMIN’ and one fatal error “Call to undefined function mysqli_connect()”.

In all fairness, I’m using version 4.9.4 of WordPress and the documentation shows that the Server Info plugin hasn’t been tested with it. But I didn’t expect a fatal error crash.

This WordPress site is on a 3rd party shared hosting platform running IIS. I have a plugin that I am developing that works flawlessly on my other WordPress sites but fails on this one. I suspect an out-of-date component — either PHP or MySQL or something unexpected. I was hopeful that the Server Info plugin would help me track down the culprit.