This is because the Evernote workflow is not getting any relevant results from Evernote.
This can be for a few reasons so check that:
You're using Evernote 7 from the legacy page on Evernote's site (https://help.evernote.com/hc/en-us/articles/360052560314-Install-an-older-version-of-Evernote) as the new Evernote 10 is a black box and doesn't allow other apps to search its results
Make sure you're using the right Evernote workflow version from the first post of this thread to match your version of Alfred and Evernote
Once you've done this, when you type "ent" followed by a space, first, Evernote should launch in the background if it wasn't already open. Then you should see the first result as "Show in Evernote" with the subtext "Displaying 10 notes from xxx notes" before you even type anything else. This confirms that the workflow is working and has access to your notes.
Then as you start typing your query, the list of results should filter down to relevant ones.
Let me know how you get on This is an excellent workflow I use a lot, but you have to have the right version, which is a little trickier now that Evernote have moved on to an Electron version for v10.