Besides from the error messages, you do not provide much info and therefore it is difficult to help you. But here is a few suggestions to things you should start with
Start the development environment and run the table 18 - Customer directly - If that is possible then there is something wrong with your Customer List page. If the Customer table does not run then what error do you get.
Run the page 22 - If that one does not run - then you should get an errormessage about why - Most likely because a field has been deleted on the table and not on the page.
In Development try to select functions, and build server objects.
Is this a new message? A new user? all users?
The error message tells you what is wrong, the foldername is missing. Perhaps you do not have write permission to the folders on the computer?
Printer Selection is mission. Does it work in Cronus International Company or in one of the other companies you might have?