i installed Wordpress plugin called "CIDRAM" and when tried to activate it, i got error:

Plugin could not be activated because it triggered a fatal error.
[CIDRAM] Can't read the configuration file! Please reconfigure CIDRAM.
When i renamed

Then plugin activation started working.

PS: i also edited that config.ini file and replaced REMOTE_ADDR by HTTP_CF_CONNECTING_IP in variable "ipaddr" as my site is under Cloudflare