After upgrade to 3.14 and to the latest version as well, I'm unable to set simple survey question condition.
E.g. I want do display the second question only to those participants, who answered "yes" to the first yes/no type question. But the conditions editor does not list the answer options for first question in the admin web front-end. Screenshot enclosed. However, entering the relevance directly works as expected.

I can confirm that. The Answer Predefined selection list is empty.
That is not only the case for Y/N question type. Please open a bug ticket or add to a ticket.

AddOn: As a workaround you can hit the reload button of the browser on the condition page.

The issue looks like this one:
bugs.limesurvey.org/view.php?id=13940

There seem to be more and more issues around conditions.
bugs.limesurvey.org/view.php?id=13716
Seems to be not used by many users and developers these days.

Thanks for info. I can confirm, that the reload workaround works fine. Will check the bug reports once I have some time.