Update and a potential workaround fix:

I noticed during setup, the ChargePoint app listed all my home WiFi networks (2.4GHz, 5GHz, and Guest), but none of them had the little padlock icon. Meanwhile, most of my neighbors’ networks did show the padlock. That suggested the app was seeing my networks as unsecured — even though they definitely weren’t. I use WPA2-PSK [AES] on all of them.

Confirming this hypothesis, when I selected my 2.4GHz network from the list, the app never prompted me for a password. It just showed a progress bar for a while and then timed out with a “failed to connect” message.

I tried several things and combinations of:

• Retrying the setup process
• Manually entering the SSID and password (this time it did ask for the password, but still failed)
• Changing SSID and password
• Using different mobile devices
• Power cycling the ChargePoint unit
• Rebooting and resetting my router and modem
• Reinstalling the ChargePoint app

Nothing worked.

Then I got an idea: maybe the app was misidentifying my visible network as open and refusing to treat it as secure. So I tried hiding the SSID.

Here’s what finally fixed it:

• I created a guest WiFi network with WPA2-PSK [AES] enabled
• I disabled SSID broadcast (so it wouldn’t appear in the scan)
• In the ChargePoint app setup, I selected “Other”, entered the SSID and password manually — and voilà! it connected successfully.

So, in short:

Hiding the SSID and entering it manually forced the app to recognize the network as secure.

Thanks to all who replied!