Is it possible that SMB settings are related to the 0x11b error when adding a network printer?

Yes, especially on older Windows versions or networks, SMB (Server Message Block) settings can impact network printer connectivity. Ensure that SMB 1.0/CIFS File Sharing Support is enabled (though generally discouraged for security reasons, it can be necessary for older devices). More modern setups should be using SMB 2 or 3. Verify that the printer or print server supports the SMB version being used by the client machine. Also, ensure network discovery is enabled.