Steps to reproduce

1. Install Ibexa DXP v4
2. Create an article
3. Add an empty link in the intro field (do not fill in any input)
4. Publish content

Result

Argument '$xmlDoc' is invalid: Transformation of XML content failed: Error in 0:0: Unhandled link type 

Expected

It should not be possible to save an empty link, in v3.3 there is no such possibility. The link modal will simply not close before the user has provided a link target

Note

After adding such an empty link, the text is not underlined, and when you click on it, there is no popup to edit the link, but in the source code you can found

<a title="" target="">Link</a>