Trying to setup a field to use the entity browser. I get the error:

Drupal\Component\Plugin\Exception\PluginNotFoundException: The "" plugin does not exist. in Drupal\Core\Plugin\DefaultPluginManager->doGetDefinition() (line 52 of /Users/steveedson/repos/d8/core/lib/Drupal/Component/Plugin/Discovery/DiscoveryTrait.php).

• To reproduce, create a new drupal 8 site, install the entity_browser module. Create a new content type and add a Other > Entity Reference field.
• Under "Manage Form Display" change the widget type to "Entity Browser"
• Try to create a new piece of content from the new type

I might be using this wrong, so if anyone could help me fix this issue, or add a field that opens the entity browser, that would be great.

Thanks.

Drupal: 8.1.8
Installation profile: Minimal (minimal-8.1.8)