**Steps to replicate the issue** (include links if applicable):
* Go to Wikipedia article https://da.wikipedia.org/wiki/Lars_Poulsen_(gr%C3%B8nlandsk_politiker)
* Select "Add interlanguage links" in the tools menu
* Select Language=dewiki
* Select Page=Lars Poulsen (Politiker, 1984)
* Click the "Link with page" button
**What happens?**:
I got an error message with the text:
An error has occured.
The follow parameter was found in the query string, but must be in the POST body:
token.
**What should have happened instead?**:
The Danish Wikipedia article should have been attached to the same Wikidata item as the selected German Wikipedia article (https://www.wikidata.org/wiki/Q107279934) giving interlanguage links between the articles.
**Software version** (on `Special:Version` page; skip for WMF-hosted wikis like Wikipedia):
**Other information** (browser name/version, screenshots, etc.):