Unable to acces Web-GUI even though Bridged AP mode works fine and Upstream DHCP seems to work fine. Pi Zero W.

[bluemanvr]

Hello. I finally managed to get RaspAP installed on Raspberry Pi Zero W v1.1
Using the quick install worked fine with attached OTG Ethernet USB adapter via PuTTy on windows 10. Then i access the Web-GUI fine using the IP address for the raspberry given by the router DHCP found in my router which is NOT 10.3.141.1
Then i change WiFi settings: SSID, Password, Channel and click on Bridged AP mode. Then i click on Restart AP.

When restarted i can no longer access the Web-GUI as per the documentation. However the documentation states i can access the Web-GUI and raspberry via upstream-router given IP address or its host-name which i have at default: raspberrypi.
If i cannot connect to the Raspberry Pi at all, how come the access point works? With that i mean that i can connect to the Pi WiFi SSID and have internet access. So it really works but i cannot configure it because i cannot connect to the Pi or Web-GUI.

I have a theory that the Web-GUI is somehow hosted on a IP that is not within the sub-net of my home network. Due to default settings not getting updated somehow and retaining the default IP address of 10.3.141.1 even though i installed RaspAP with Ethernet adapter plugged in to home network.
I need to access the Web-GUI to be able to change WiFi password etc.
How can i see "Where" the Web-GUI is with commands input on the raspberry pi with attached keyboard and HDMI monitor?
How can i change the static IP address of the RaspAP as i would do with any other router configured for AP mode without the Web-GUI?
Thank you for any help.