Hello,
I'd like to get a little more information about the error that you are reporting.
What kind of data is in your web map? Is it a hosted feature service, or a shapefile added directly into the web map?
Are you using an Organizational account?
What type of symbology is being used in your web map?
If anyone has a specific web map that they would like to share, please feel free to message me the URL.
Thanks,
Kelly