For some reason just in a last few days I am getting this error :
The XMLHttpRequest progress event property 'position' is deprecated. Please use 'loaded' instead.
init.js:1485 dojo.io.script error Error_ssl: undefinedcode: 500details: Array[0]httpCode: 500log: undefinedmessage: nullstack: (...)get stack: function () { [native code] }set stack: function () { [native code] }__proto__: d

and this look:

The application used to work just fine and none changes has been done. Is this error is on ESRI side