After updating my wiki from 1.27.1 to 1.28.0, VisualEditor has stopped working. I click the Edit tab, and the page content fades slightly in color as if VisualEditor were about to load. But then the editor tools don't appear, and Chrome displays a dialog box:

example.com responded: "http" [OK] [Cancel]

There are no PHP errors in the Apache error log, and no errors in the parsoid log file (looks like a normal parsoid access). However, Chrome developer tools show a JavaScript error: BadMethodCallException. If I remove VisualEditor from LocalSettings.php, the error vanishes.

The only extension I am running is VisualEditor; otherwise it's a vanilla MediaWiki that requires users to be logged into read (a private wiki). The same LocalSettings.php files works perfectly in MW 1.27.1.

Has anything significantly changed in VisualEditor that I need to configure it differently?

LocalSettings.php has:

# visual editor $wgDefaultUserOptions['visualeditor-enable'] = 1; $wgDefaultUserOptions['visualeditor-enable-experimental'] = 1;

$wgVirtualRestConfig['modules']['parsoid'] = array( 'url' => 'http://localhost:8142', 'prefix' => 'example.com' );

$wgSessionsInObjectCache = true; /* Using memcached */ $wgVirtualRestConfig['modules']['parsoid']['forwardCookies'] = true;

The parsoid settings file has:

parsoidConfig.setMwApi({ prefix: 'example.com', uri: 'http://dev.example.com/w/api.php' }); parsoidConfig.useSelser = true;

Thank you for any insights! DanB