Access Web Config and select the Print tab > Error Settings.
Set each item.
Paper Size Notice
Set whether to display an error on the control panel when the paper size of the specified paper source is different from the paper size of the print data.
Paper Type Notice
Set whether to display an error on the control panel when the paper type of the specified paper source is different from the paper type of the print data.
Auto Error Solver
Set whether to automatically cancel the error if there is no operation on the control panel for 5 seconds after displaying the error.