It might be network slowness, one day at the rental counter all the paperwork had to be done by hand (and visa contacted by phone to process payment) because their system was down. It took a literal hour.
The terminal was unresponsive and displaying the following error: "cannot connect to mainframe" (This was in 2019).
The terminal was unresponsive and displaying the following error: "cannot connect to mainframe" (This was in 2019).