Can't edit my default theme

[Sheffielder]

Hi all,

Am trying to edit the default theme html/css

When I click the button it flicks to an error page:

 

This page isn’t working

www.forums.co.uk didn’t send any data.

ERR_EMPTY_RESPONSE

[bfarber]

Most of the time this is due to mod_security on the server, or a similar "firewall" or security protection.

[The Old Man]

If you have Wordpress, I recently had to remove the Wordfence plugin (an excellent software firewall/security plugin) because it kept stopping me editing settings and templates in AdminCP, even though I told it to ignore my IPS Community folder. It got to the point where I was concerned about upgrades being interfered with.