The till says it can't take card payments

When something stops the whole till, it says so in place of the menu, under Can't take card payments here, and the line under it is the reason. Press Back once it is fixed and open the till again.

• This event is still a draft. Publish it to take payments.: publish the event first.
• That door PIN doesn't match this event.: the PIN changed. Close the till and open it again from the event.
• You're not set up to take card payments on this event. Whoever runs it can turn that on from the Team screen.: whoever runs the event turns on Take card payments for you on the Team screen.
• Couldn't read this event's door PIN. Close this and open it again.: what it says. Close the till and open it again.

On an Android phone, Stripe checks the phone too, and the reason is about the phone:

• Developer options are on. Turn them off in Settings, then try again.
• This phone needs a software update. Update it in Settings, then try again.
• Stripe doesn't accept cards on this phone. Use a different phone.
• The PIN pad can't open while the screen is recorded or another app draws over it. Turn that off, then try again.

A different screen, Ask the organizer, means this account is not allowed to take card payments on the event at all. The organizer turns it on for you, or rings the sale up themselves.