In reply to Cindy Wang.

It does have '/reports/reports/' in the string, but I'm still finding out about guest access. This is the actual error message that comes up in the HTML form:

{"errorCode":0,"message":"The file could not be found.","details":["traceId: 120735edfcbd52f6","path: /files/files/cf71003c-dde1-4503-8fc2-189e292335e0/content"],"links":[],"version":2,"httpStatusCode":404}

Thank you again.