Hi,
I have 1.5.3 version installed, and the problem I have is that when upgrading any user (password, time zone, etc ...) I get this error.
Searching in the forum, one saw the same thing had happened and that was the mod_security. I contacted the hosting and they swich off it (or so they say).
If the mod security is disabled, what else could it be?
As I make sure that is disabled?
Thanks