Issue with Internet Explorer

[littlephone]

Internet Explorer 10+ generates error on line 445 to line 446:
xhr.responseType = 'text'; xhr.open('GET', url);
It is working fine if the above two lines were reversed:
xhr.open('GET', url); xhr.responseType = 'text';
Anyone has the same issue ?

[arte0s]

I had the same error in IE11 and just comment line 445:
//xhr.responseType = 'text';
Everything started to work fine...

[lucatacconi]

Tested reversing order of lines xhr.open('GET', url); xhr.responseType = 'text';
It seems fixed on IE11. Thanks to @littlephone and https://github.com/mhaderman