i have a RB133 which had a similar issue:
could not get roteros.dll: no reply!
I had deleted the Winbox folder, downloaded the new exe and ran the application for MAC login.
However, the routerboard keeps on getting disconnected ?
why does it reboots everytime I login using Winbox ?
has anyone faced this issue ?
I have downloaded... ROS: 2.9.50 but will not be installing it for now. Will wait for a response from you