Ideas
Hey fma6464,
This certainly seems like a pretty strange situation if you're still able to play them in-game normally and just can't view or access them in the locker tab, sorry to hear that's keeping you from getting to customize any of those legends.
Are you playing on Steam or through the EA app? Can I check which resolution you're using as well? That screenshot definitely seems a bit stretched or distorted in addition to having the missing classes.
Given what you've already tried, I would definitely suggest repairing the game entirely at this point. If you're on Steam, that's done with these steps to verify the integrity of your games files.
If you're on EA app, you can click the 3-dot icon on your game tile and select the Repair option.
I'd try repairing your game to make sure this isn't just a corrupted interface, but if you're still seeing this after a repair, a complete reinstallation may be in order.