Unexpected error on promoting iCal Feed Importers from dev to test

I got two iCal feeds working in my dev environment, made them into features, and then pulled all the dev code into my test environment. The Feeds and Date_ical modules were in test, as was my importer feature. I activated all the modules in test, but got the following message after saving the configuration on the modules page:

Missing Feeds plugin DateIcalIcalcreatorParser. See dining_ical. Check whether all required libraries and modules are installed properly.

The error message repeats for events_ical, my other feed importer.

I looked at all the plugin/library files for both Feeds and Date_ical, and the files exactly match. DateIcalIcalcreatorParser.inc appears as part of Date_ical in both dev and test, so I have no idea what I am missing. Could it be a configuration? I pulled my configurations from the prod environment, so they don't reflect what I have done with feeds. However, I put all my configurations from dev into a feature.

Another clue may be the fact that I get a page not found error when I click on the Mapping configuration link in either of my two feeds in test.

What am I missing here about migrating working feeds into a new environment?