This bug seems to rear its ugly head when people either:
- use the cheat code for max money, or
- grind, er stroke, in the school bathroom many days in a row to get a lot of money
and then buy everything in the store when it pops up rather than to wait to buy things only when a quest calls for them. This can clog the inventory, similar to your case.
Since you only have those 2 quests showing --- In order to properly get past this bug, you will need to follow the final piece of advice in my posts that I have underlined - and go to an even earlier save to where you have a few more inventory slots available so that, as mentioned, all the cameras end up on the 1st page of the inventory.
Honestly, this quest is so early in the game play process that a person could start a new game, put text on skip mode, and speed run to this quest to get it done right in a rather short period of time and move forward.
This bug will most likely not be fixed in any upcoming update because they've known about it for awhile, never was able to replicate it until about 2 updates ago when it was figured out by fans what caused it -- and they haven't fixed it in at least the one update since they have known what causes it. So if people want to get past this bug - they are going to need to go to a previous save that allows them to move past it or restart the game and make sure not to buy anything until needed.