I ran into circles for more than one hour, before eventually understanding that one needs to install the lib32stdc++6 package in order to use the Brother drivers (HL-L2365DW printer) on an amd64 system, since they are provided as i386 packages. Only after, I realised that there was more than a hint in the online instructions. The hardest part was that without lib32stdc++6, everything seemed to work fine, except that nothing was coming out from the printer.