I have a presentation board problem too, but not a vanishing one. Mine has just 'Put in Inventory' option, and when I looked at things closer, I understood why: the game gave my sim the wrong presentation board. The board he has is for a class that has Final Exam as the top requirement, and the class that does have Presentation requirement doesn't have a board in his inventory. (You can see what class the board is for by hovering your cursor over it, it's mentioned in the tooltip.)
Specifics:
- Degree Program: Communications
- Class that has Give a Presentation! requirement: How Controversial! Difficult or Divisive Discussions
- Presentation Board he has in his inventory: Personal Brand: Public Privacy in Our Modern Age
- Personal Brand: Public Privacy in Our Modern Age requirement: Take Final Exam!
So obviously there's no option to work on the board, since that class does not require a presentation.
Joining the chorus wishing we could buy the boards from the kiosk, or email the professor to get a new one or something.
Later Edit: I continued playing the sim with the bugged presentation board and figured that since it says the presentation is a large part of the degree, instead of saying necessary or obligatory part of the degree, I'd just study harder otherwise. Made sure he was early to class with homework done, always took notes in class, and studied that subject from the text book a lot. The day before term ended, he emailed his professor, who called him a stellar student, and indeed, when the grades came in, he got A+, despite never having done the presentation board for the class.
So a simple workaround until the boards are fixed: study extra from the text book and make sure to do all the homework well and to take notes in class.