emfox@XXXX:~$ syncevolution --configure --template WebDAV username=XXXXX@gmail.com password=XXXX database=https://google.com:443/carddav/v1/principals/XXXX%40gmail.com/lists/default/ target-config@webdav

[INFO] addressbook: looking for databases...

[INFO] addressbook: okay

[INFO] calendar: looking for databases...

[INFO] calendar: no database to synchronize

[INFO] memo: looking for databases...

[INFO] memo: no database to synchronize

[INFO] todo: looking for databases...

[INFO] todo: no database to synchronize

emfox@XXXX:~$ syncevolution --configure --template SyncEvolution_Client syncURL=local://@webdav sslverifyserver=0 username= password= webdav addressbook

[INFO] addressbook: looking for databases...

[INFO] addressbook: backend failed: error code from SyncEvolution authorization failed (remote, status 401): PROPFIND: Neon error code 3 = NE_AUTH, HTTP status 401: Could not authenticate to server: ignored GoogleLogin challenge

[ERROR] addressbook: backend failed: error code from SyncEvolution authorization failed (remote, status 401): PROPFIND: Neon error code 3 = NE_AUTH, HTTP status 401: Could not authenticate to server: ignored GoogleLogin challenge

I searched the maillist, and realised it may be an ssl issue, so I add the sslverifyserver=0 option.

What could be the problem?