Thread:Extension talk:Push/SSL or 1.24.1 problem?

The error: Dateitransfer fehlgeschlagen: Authentifizierung auf https:// /api.php ist fehlgeschlagen. shows up when configured for a 1.24.1 wiki. I know that the MediaWikiApi for 1.24.1 has been changed in an unfortunate incompatible way. Since this extension is from 2011 I am wondering whether or something else. How would I debug this situation?
 * SSL is the problem
 * 1.24.1 is the problem