RB750 (v5.0-rc12) Wibox can not scan MAC & IP

RouterOS General
1

Dear support team,
I installed V5.0-rc12 in RB750 when we changed port 3,4,5 from slave port to none the Router restart automatically after that Winbox canot scan MAC & IP address of router.

Help me to bug this mentioned
Thanks.

2

Check your windows firewall.