Reported at https://fi.wikipedia.org/wiki/Wikipedia:Visuaalinen_muokkain/Palaute
User told that they can't add links at all using VE. When they click "done" the link editor is just loading. Even if they click cancel nothing happens, so it gets stuck.
I tried to reproduce and I succeed to add links, but when I chose text containing a empty line I can reproduce the error. In the console I can see "TypeError: newSel.equalsSelection is not a function".