Nexis Uni is not always able to accept incoming links directly to an article. Instead, Nexis Uni will sometimes take you to a search page that contains the title of the journal or periodical pre-selected and the option to search for the article inside that title. 

Example: when you find a link found in OneSearch for an article in Nexis Uni, be sure to note the article title (you can copy and paste it in the search box). 

Clicking through to Nexis Uni shows a search screen for articles in that journal.

Type or paste the name of the article in the search box and click the search button. That should retrieve the article you seek. Note that in some cases, the article title listed in OneSearch is not the same title retrieved from Nexis Uni, which sometimes happens when the title of an article published online is changed when it is printed in a journal. You can confirm it is the article by checking the journal title, issue, and / or author name.