Cannot add publication by ISBN

[Thomas Niebler]

When trying to add a publication by ISBN, I can search for the ISBN. But when I try to click on the found item, I cannot add the publication, because I get the following error message:

Could not scrape the URL null. Message was: java.lang.NullPointerException

[Robert Jäschke]

fixing issue #2802

→ <<cset d0c187282c98>>