The filament may be entangled; remove-it, check if there is no more node and start again the printing.

Check the printer is well connected and turn it on again (no worries, it happens even to the best)

Remove the card and drag it back carefully, taking care not to sink the card too much, otherwise the SD card is not detected.

Check the connections of the motherboard (you probably reversed the connections).

Check your end-stop connections, your X have to go on the X- and the Y on the Y-