Captive portal connection with connman

I am trying to use connman to connect to a captive portal. I think I
know the web page I need to navigate to to get the connection
information set, but every time I try to connect via connmanctl, I
get:
connmanctl> services
    GI-Guest             wifi_b827eb52ccd0_47492d4775657374_managed_none
connmanctl> connect wifi_b827eb52ccd0_47492d4775657374_managed_none
Error /net/connman/service/wifi_b827eb52ccd0_47492d4775657374_managed_none:
Input/output error
this is with this connman and iwd:
connman-git/now 1.43.r2.g6bd97592-1 arm64 [installed,local]
iwd-git/now 3.1.r0.gccd91fe5-1 arm64 [installed,local]

Is this what is supposed to happen? I expected a connection then I
would need to manually open a browser then go to the captive portal
website...

Keith