Andre has noticed that there is an error in javascript console too: Uncaught Error: Unknown dependency: jquery.clickTracking

Here is screen recording of the bug: https://saucelabs.com/tests/9a9c786ff3204ad8b9594f516e4df2c3

The interesting part is between 0:20 and 0:30.

It does load on test.wikipedia.org.

Not sure if this should be under "Mediawiki > Page editing", or "MW Extensions > WikiEditor", or if it's a server config issue for test2. ("Wikimedia").

Upload wizard does not even load:

https://wmf.ci.cloudbees.com/job/desktop-browsers/BROWSER_LABEL=chrome/lastCompletedBuild/testReport/(root)/UploadWizard/Navigate_to_Upload_page/

https://saucelabs.com/jobs/50f39cf990b649ceab8fee9b81d597c9

Search suggestions do not appear:

https://wmf.ci.cloudbees.com/job/desktop-browsers/BROWSER_LABEL=firefox/lastCompletedBuild/testReport/(root)/Search/Search_suggestions/

https://saucelabs.com/jobs/4bdc2893a8a14ed49cc451ebb0edb6ca#

Console on test2 for UW is showing "Uncaught Error: Unknown dependency: jquery.clickTracking"

Should be fixed now:

https://gerrit.wikimedia.org/r/#/c/38737/

ArticleFeedbackv5 requires click tracking extension which was not enabled on test2wiki.

Tests confirm that it is fixed: https://wmf.ci.cloudbees.com/job/desktop-browsers/

I am investigating why a few IE6 and IE10 tests failed, it is not related to this bug.