It’s possible for apple mail to be the default reader in launch services (presumably old installs where preferences have persisted since before apple mail’s rss support was dropped) which will then throw an error when using the extension if the user has not selected a reader from the app.
Easiest fix is blacklisting the apple mail identifier for v1.x and v2 onward won’t be affected by this due to using whitelisted readers.
It’s possible for apple mail to be the default reader in launch services (presumably old installs where preferences have persisted since before apple mail’s rss support was dropped) which will then throw an error when using the extension if the user has not selected a reader from the app.
Easiest fix is blacklisting the apple mail identifier for v1.x and v2 onward won’t be affected by this due to using whitelisted readers.