inspector.js:3375 Could not load content for https://XXX/js/angular.js : HTTP status code: 404 contentLoaded @ inspector.js:3375

inspector.js:405 Uncaught (in promise) TypeError: Cannot read property 'indexOf' of null
    at Object.TextUtils.isMinified (inspector.js:405)
    at Sources.JavaScriptSourceFrame._detectMinified (chrome-devtools://devtools/bundled/sources/sources_module.js:505)
    at Sources.JavaScriptSourceFrame.onTextEditorContentSet (chrome-devtools://devtools/bundled/sources/sources_module.js:503)
    at Sources.JavaScriptSourceFrame.setContent (chrome-devtools://devtools/bundled/source_frame/source_frame_module.js:194)
    at <anonymous>