I have checked your printers.conf and the non-working FollowMe has the line
AuthInfoRequired username,password\
which the working SRB02MF001 does not have. Stop the CUPS daemon, then edit your /etc/cups/printers.conf removing the mentioned line from the entry of FollowMe. Then start CUPS again and see whether the problem goes away. Seems that older CUPS versions needed (or at least inserted) this line and newer ones have problems with it. If the removal helps, we will look into removing this line during the package installation/update of CUPS.
I have checked your printers.conf and the non-working FollowMe has the line
AuthInfoRequired username,password\
which the working SRB02MF001 does not have. Stop the CUPS daemon, then edit your /etc/cups/ printers. conf removing the mentioned line from the entry of FollowMe. Then start CUPS again and see whether the problem goes away. Seems that older CUPS versions needed (or at least inserted) this line and newer ones have problems with it. If the removal helps, we will look into removing this line during the package installation/update of CUPS.