|What cartridge is the error message about? Black or color?|
If the error is about the color cartridge, printed black (text) is still possible.
Color prints can show missing/faint color. The color cartridge contains 4 colors, so one color low is enough to trigger an "out of ink" alarm.
My HP printer now shows black ink low error, but I can still print good quality text. Maybe next print will show up faint or missing black ink.
You can wait till the ink is completely depleted or change ahead and don't risk to start printing a 20 page document and conclude the ink is indeed finished....