I have a 18 pin Bolt configured as a client, and it works fine.
When it is configured this way, should I not be able to reach the Web GUI, if I need to change which SSID I’m using?


You should be able to access the GUI if you know what the assigned IP is for the Bolt. I would check your Router for connected devices, and verifiy if the bolt is connected. Then check for the IP. If not, you will need to do a reset of the unit to reconfigure it.