Attempt to batch-add relationships causes JavaScript exception

An attempt to batch-add relationships for this release causes a JavaScript exceptions in both Chrome and Firefox:

To reproduce: open a release, click on “Edit relationships” in the right column. In both Chrome and Firefox I see a “loading” animation which does not stop. If developer console is opened with F12, it shows some JavaScript exceptions.

If this forum is a wrong place to report such errors, where should they be reported?

Bug is already reported on

This bug has been fixed 3h ago. Thanks for having reported it, and sorry for the inconvenience.