When you click "Browse topics" at the top of a page that doesn't have many topics, an error appears instead of the topic list.
This was caused by https://gerrit.wikimedia.org/r/#/c/206827/ , and specifically by flowBoardComponentTocFeatureMixinTopicListApiPreHandler (in flow-board-toc.js) returning false on line 84
| Subject | Repo | Branch | Lines +/- | |
|---|---|---|---|---|
| Only display API errors | mediawiki/extensions/Flow | master | +93 -83 |
A similar error appears when you try to change the sort order.
Fixing the prehandler thing at flow-component-event.js:907 exposes another issue when changing sort order. It complaints that another request is already in progress. Changing the sort order triggers a refresh of the TOC (flow-board-navigation.js:77).
Not sure but I think because of the refactor, the 'inprogress' classes are removed later than they used to be so a loadHandler cannot trigger a request because it looks like the original request is still in progress.
Change 208387 had a related patch set uploaded (by Matthias Mullie):
Only display API errors