Hi Robert,
thank you for your replay. Unfortunatelly, I cant find the same path as you described. I find "createCSVString function" only under path below, but i ques it is wrong js file. Could you please specify in more detail where could be located export.Utils.js file?
c:\Program Files\ArcGIS\Portal\apps\webappbuilder\stemapp\widgets\AttributeTable\Widget.js
Thanks in advance.
Martin