A lot of times internal errors and other bullshit can happen when a sector shits itself. Try teleporting somewhere else and maybe reloading game. It works with a lot of other game mechanics, I’m sure deposits as well.
The only other thing I can think of where I have personally had issues was when using a card that required third party in-browser authorisation, and you tried to deposit using the in game deposit button, it just wouldn’t work. You would have to deposit via website instead.
Been a while since I deposited so I’m not sure what tomfuckery is going on these days.