I have been using a MikroTik CRS312-4C+8XG-RM for some years, and occasionally get the above error - particularly when changing network configuration. I have just changed routers and can access the internet and other devices via the MikroTik switch, but whatever I do I am unable to log into it using WinBox (64bit) v3.31 - everything I try gets “ERROR: could not connect to 192.168.88.1”
Winbox V3.31 is rather old. Will work on V6 ROS , V7 ROS requires V3.33
V3.38 is the latest now
Or try “Neighbors” and use the MAC address