Dolphin asking to recompile

Hi

i'm hoping someone can help. everything on the site was working well then last Friday i noticed this appear on nearly all the pages:

Warning! PageView cache cannot be evaluated. Please recompile.

the only sections it's not appearing on is Groups and Listings (an modzzz addon)

I have no idea what this means or how to recompile :(

Can anyone help please. The site is http://tcn.uk.com/index.php

Thanks

Lee

I think you have to go to your admin panel => Settings => Languages Settings and compile your language there.

Clean/delete the entries in your file manager of your cache folder as well as cache_public and tmp folder, but leave the .htaccess files there.

I guess :-)

Ahh, you should go to admin panel => Tools => Modules and recompile your installed modules!