How do low ink levels or a full maintenance box affect an Epson printer's error state, and what is the solution?

Low ink levels in one or more cartridges, or a full maintenance box, can indeed halt printing and trigger an error. Check the ink levels via the printer's display or the Epson Status Monitor software on your computer. Replace any cartridges that are critically low or empty. If the maintenance box is full, it needs to be replaced, as it stores waste ink from cleaning cycles and prevents further operation until changed.