Brother Scanner does not work with macOS Catalina
&quot;The Brother ControlCenter2 is not supported by macOS v10.15.
Use the Brother iPrint&amp;Scan as an alternative function.&quot;
Source Brother macOS Catalina Support Statement

Control Center was a 32-bit application that Catalina wont run. Update MFC-8890 DW drivers provided at Brother website for 10.15 support.