Lexmark MX810
Try one or more of the following:
Turn off the printer.
Unplug the power cord from the electrical outlet.
Install the specified tray.
Connect the power cord to a properly grounded electrical outlet.
Turn the printer back on.
How to Install the Application List Manager for the X204, X26x, X36x, and X54x* Series MFPs
Unable to install solutions via the embedded web server (EWS)