You gotta love some hosting companies 
Yes the session_start() needs to be the first line in a script but if you look properly you will see that it is the first line (the other stuff is comment so it doesn’t count).
The main error here is the following:
Warning: session_start(): open(E:php_sessionssess_409e8c3488479755b5e973f0c3199c2d, O_RDWR) failed: Permission denied (13) in E:hshomekevin897mcsherry.iewp-contentpluginswordpress-paypal-shopping-cartwp_shopping_cart.php on line 22
once you take care of that the other one will go away automatically. Basically, something is wrong with your session save path or something so when it’s trying to save it in the session it’s failing.
I can’t tell you for sure but it’s something around fixing your session save path in the PHP.ini file or adding a tmp directory for session. Your hosting provider should know this if they don’t this Instructions might be of some help: