osc v2.3.3.4 error

Our site developed the following error this week: Warning: mysqli_insert_id() expects exactly 1 parameter, 0 given in /home/skyspet3/public_html/catalog/includes/classes/[login to view URL] on line 151 After checking, I believe it's because a previous developer left certain directories pointing to the demo directories and those suddenly disappeared. I can't contact him unfortunately, as he died unexpectedly in the past year. I believe this to be a configuration error, as my cache directories were also pointed to nonexistent directories. I have corrected that, but now In addition, there is a module called Superfish that may need looked at for configuration files. I need the site back up and running correctly. At completion, I will test all functionality, ensure we're working well, then promptly pay, plus tip for good service. In addition, I want to upgrade the store from OSC v2.3.3.4 to v2.3.4 and the PayPal and [login to view URL] modules to their latest versions. Upon satisfactory completion, and after payment, I'll ask you to give me a quote on that work. I require the winning bidder to have extensive experience with OSCommerce. Please do not reply if you don't.