Strange behaviour when modifying connectivity dtype tags from the Connectivity editor

Steps: create a new connectivity by deleting some nodes or modifying some edges.

Issues: the new connectivity doesn't inherit either the tags or the subject from the connectivity it was derived from. I'd expect to at least inherit the subject tag.

When saving the tags of a connectivity – the overlay was launched from the connectivity editor, 'gear button' – an error message appears. See figure and logs attached. The tags are saved though.

After the tags are saved users are sent back to the large-scale connectivity launching page, ie, the one before the connectivity editor. This is another case of hindered flow. after editing metadata it should be possible to stay in the page we were working on.