If your C8155 is running firmware older than 6 months, and your computer is on the latest Windows 11 update, they are speaking different languages. Xerox releases "Driver Validation" notes with every firmware update. Before blaming the driver, run a Firmware Upgrade via the Device Web UI (type the printer’s IP into a browser).
Here is the most common support call we hear: "The driver says 'Paper Mismatch' but the tray is full of Letter!" xerox altalink c8155 driver
Have a specific error code on your C8155? Drop it in the comments below. If your C8155 is running firmware older than