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The Story Map Cascade app template enables an immersive story-telling experience using a map with narrative text and inline multimedia content. In some instances, the Story Map Cascade app does not load when the application is launched in ArcGIS Online. The following scenarios are observed when the application is reviewed through the Console tab of Chrome Developer tools:
This issue usually occurs due to a syntax error in the JSON of the Story Map Cascade app. For example, invalid unicode characters such as '/n' (Line Separator) may appear on a script when copying and pasting the script into the application template. The line separator may appear invisible when copying to the application template, unless the script is viewed in a text editor.
Follow the instructions provided below to identify and delete the invalid sections of the script that make up the JSON of the Story Map Cascade app:
Note: Use of ArcGIS Online Assistant is not supported by Esri Support Services and is for advanced users only. Mistakes made when editing the JSON of an application can irrevocably break the application. Please create a backup copy of the JSON before editing.
Error: Error: Parse error on line 19: ... "selected": true\ n }, "font -----------------------^ Expecting 'EOF', '}', ',', ']', got 'undefined'