I have been using Contact Form 7 for ages now on several different sites and it normally works with no errors. However I am developing a site at the moment and when I activate the plugin it effects the pages and menu sections in the backend of wordpress. When I go to pages the panel showing the list of current pages has disappeared. The same goes for menus. When I deactivate the plugin, they appear again.
I assume i've simple done something wrong along the way, however has anyone else experienced this issue?