I've found this: Alfresco error after update
Leading to this: Breaking Changes · microsoft/TypeScript Wiki · GitHub
But I have no idea what to actually do - where is this "...d.ts" - file - should I create this? Where should I actually put this? There is nothing helpful for someone completely new in the matter. Can you point me what exactly should I do to avoid this problem?
"ERROR in node_modules/ng2-alfresco-core/src/utils/file-utils.ts(19,13): error TS2304: Cannot find name 'WebKitFileEntry'."