Hi @Yavgeni K ,
MAP Toolkit mostly get stuck because is trying to connect to a machine that was already discovered in a previous scan.
You can check into the log file and you will se the name of that machine.
Scenarios are 2:
Ping the machine, probably the machine is down
In the previous scan you used a different user and now you are using a new user which has no access to that machine
Just press cancel, your data are still saved.
Press refresh data and wait 1-2 minutes for the MAP Toolkit consolidate new data with the old data.
Peace.