Issue Summary

If a page is on a plan that does not support component subscriptions, and you attempt to upload a CSV of subscribers containing component codes you get the attached error stating that there is an issue with component codes, when in fact the issue is that the page does not support component subscriptions due to it only being available at the business tier or higher.

Steps to Reproduce

1. Have a page at the Hobby or Startup tier
2. Create a CSV import file where component IDs are specified for a user
3. Upload the CSV for import

Expected Results

It would be nice if there was a more helpful error like maybe if there were an additional note in the popup whenever selecting to import stating that their plan is not eligible for importing component codes, or maybe even just providing a note in the template we provide stating that they need to make sure that they are both on an appropriate billing tier, and that their page has component subscriptions enabled. 

Actual Results

The email sent after the import is processed states "The following component codes were detected in your .csv file are invalid:" This is misleading because the codes are valid, just not in this context.

Workaround

CSV files must not contain component IDs if uploading subscribers for a page that does not have component subscriptions available.