Cre Loaded error on upgrade

Hello Coders, I have just upgraded my Cre Loaded 6.2 to 6.4 and all went well. On final testing i got this error in admin when trying to open categories/products. Fatal error: Call to a member function read() on a non-object in /hsphere/local/........./admin/includes/classes/[login to view URL] on line 175 PLease help. ## Deliverables 1) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the worker's Worker Legal Agreement). 2) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 3) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Worker in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. ## Platform Cre loaded