For reproducing this issue at least one Multiple choice question should be created.
It's possible to create a Quiz from a "Create Multiple choice question" page (by entering a Title for new Quiz - see scr.). So if you created the Quiz in a such way the next step will be to open "Manage questions" tab of this Quiz. Only one question is included in the list of "Questions in this quiz" - it was expected. But also a system gives us a result of browsing: "No questions were found" - it's not an expected result (because there are other questions in the system that were added earlier). And you can't add existing questions to the Quiz.

CommentFileSizeAuthor
add quiz.png2.63 KBolga.kostyukovich
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mikran’s picture

Status: Active » Postponed (maintainer needs more info)

Do you have language set to your quiz nodes? Ie. could this be same as #2126591: Browse for questions to add displays 0 questions?

olga.kostyukovich’s picture

The bug is similar to the issue you mentioned. When a quiz is created from question there is 'Undefined language ()' for it in a Content table (to compare: other content has 'Language neutral'). So I'll use your patch in https://www.drupal.org/node/2126591. Thanks!