How to NOT use certificates w/ a PEAP+MSCHAP connection?

I'm trying to connect to my work's WiFi network. The network uses PEAP and MSCHAP, but it does not use certificates.

When I leave the certificate path blank in the Wicd network Properties dialog, I get the following messages in /var/log/wicd/wicd.log:

2016/01/29 07:10:16 :: Attempting to authenticate...
2016/01/29 07:10:17 :: Ignoring template line: ' ca_cert="$_CA_CERT"
2016/01/29 07:10:17 :: '
2016/01/29 07:10:52 :: wpa_supplicant authentication may have failed.

I have found solutions on the Web for NetworkManager-based setups that suggest setting system-ca-certs to false, but obviously I'm not using NetworkManager. If I understand correctly, system-ca-certs is just telling NetworkManager how to configure or pass arguments to wpa_supplicant.

How do I configure Wicd and/or wpa_supplicant to know that I don't need a certificate for this network?

(Incidentally, if someone can suggest how to find/enable wpa_supplicant logging, perhaps that would provide more insight into the problem.)

Thanks!