The old RSSRadio Premium doesn’t seem to work with iOS14. You can see some instructions here on how to move your data to the current version.

Download the working version of RSSRadio from the App Store - https://apps.apple.com/au/app/rssradio/id386600664

Put your RSSRadio Premium in recovery mode in the device settings app.

Open RSSRadio Premium and choose to send the logs to support.

Change the support email address to your own

Find the email. Long press on the database.zip and save the database.zip to your files app

***On the new RSSRadio***, go to settings, backup and restore.

Choose ‘restore from backup”

Choose “open file”, and find the database.zip