ClientConfig не работает с контекстами в MODX 3

VM931:1 Uncaught SyntaxError: Unexpected token '<'
at doDecode (ext-all.js:21:49686)
at Object.decode (ext-all.js:21:51149)
at constructor.fn (modx.jsgrps-min.js?mv=300pl:39:68665)
at y.Event.fire (ext-all.js:21:3547)
at constructor.fireEvent (ext-all.js:21:668)
at constructor.<anonymous> (ext-all.js:21:71726)
at y.Event.fire (ext-all.js:21:3547)
at Ext.data.HttpProxy.fireEvent (ext-all.js:21:668)
at Ext.data.HttpProxy.onRead (ext-all.js:21:320196)
at Ext.data.HttpProxy.<anonymous> (ext-all.js:21:320083)