Invalid IP error on localhost

Hi there guys I have always loved Johncms but have been out of the whole mobile web design for just over a year now and the bug has bitten me again. I downloaded Johncms_521 last night and today I try to run it on my pc in localhost to see the changes and I get an Invalid IP error . How would I change this I'm uploading a screenshot. I'm using Xampp Control Panel v3.2.1 which is the latest coz I downloaded it in the last month. PHP version is 5.5.11

I think REMOTE_ADDR contains a IPv6 address. StackOverflow

You must properly configure Apache.
1) Open Apache configuration file (httpd.conf)
2) Find line: Listen 80
3) Replace to: Listen 127.0.0.1:80

# AlkatraZ (06.07.2014 / 21:01)
You must properly configure Apache.
1) Open Apache configuration file (httpd.conf)
2) Find line: Listen 80
3) Replace to: Listen 127.0.0.1:80

Thanks AlkatraZ I will give this a try.

Thank you so much that has solved the problem I can now enter the site and check it out... You guys rock.