Operation 'login' ended with result 'NeedToken'.
Xml: '<?xml version="1.0"?><api><warnings><login xml:space="preserve">Fetching a token via action=login is deprecated. Use action=query&meta=tokens&type=login instead.</login></warnings><login result="NeedToken" token="a69400c8a44ac98e9495258b423e534956bc031a+\" cookieprefix="enwiktionary" sessionid="435q4mp4e048qajsd3r4d1nr35jusqf7" /></api>'
A quick fix needed: Use action=query&meta=tokens&type=login instead.