Hi after updating K2 and Joomla the items tab is not accessible and creating new content cataegories on the back end gives the same result. Error 500.
On the front end there is either a message K2 is not installed! Error! Unable to retrieve any Images! or a blank page with the same error.

Our site is built around K2 and this is a serious problem. Please advise.

www.hunterstoves.co.uk