Q: RBLHGG-60adkit Bridge Antenna; no internet access

Hello,
I have a Bridge Kit and I can’t get an internet connection on the Bridge Antenna to update the RouterOS. On the Station Bridge it works fine. On the Bridge I cannot enter a gateway, the entry is deleted again and again. Maybe this is the problem? How can I change this? Thanks for any help.
Greetings from Germany, SugarShane.