New subject: ConfirmEdit/ReCaptchaNoCaptcha: Call to undefined method ObjectCache::getLocalClusterInstance()

11 Aug 2016

I'm getting the following error when trying to go to /Special:UserLogin 
with mediaWiki 1.27.

Exception encountered, of type "Error"
[60d3e595] /Special:UserLogin Error from line 360 of 
/var/www/wiki/ConfirmEdit/SimpleCaptcha/Captcha.php: Call to undefined 
method ObjectCache::getLocalClusterInstance()
Backtrace:
#0 /var/www/wiki/extensions/ConfirmEdit/SimpleCaptcha/Captcha.php(248): 
SimpleCaptcha->isBadLoginPerUserTriggered(string)
#1 
/var/www/wiki/extensions/ConfirmEdit/includes/ConfirmEditHooks.php(115): 
SimpleCaptcha->injectUserLogin(UserloginTemplate)
#2 /var/www/wiki/includes/Hooks.php(201): 
ConfirmEditHooks::injectUserLogin(UserloginTemplate)
#3 /var/www/wiki/includes/specials/SpecialUserlogin.php(1510): 
Hooks::run(string, array)
#4 /var/www/wiki/includes/specials/SpecialUserlogin.php(346): 
LoginForm->mainLoginForm(string, string)
#5 /var/www/wiki/includes/specialpage/SpecialPage.php(384): 
LoginForm->execute(NULL)
#6 /var/www/wiki/includes/specialpage/SpecialPageFactory.php(553): 
SpecialPage->run(NULL)
#7 /var/www/wiki/includes/MediaWiki.php(281): 
SpecialPageFactory::executePath(Title, RequestContext)
#8 /var/www/wiki/includes/MediaWiki.php(714): 
MediaWiki->performRequest()
#9 /var/www/wiki/includes/MediaWiki.php(508): MediaWiki->main()
#10 /var/www/wiki/index.php(41): MediaWiki->run()
#11 {main}

Other pages, including the ones which display ReCaptcha, work fine.

/Special:UserLogin used to work on this site, and started to malfunction 
a couple of days ago.

ReCaptcha is enabled with:

wfLoadExtensions( array( 'ConfirmEdit', 'ConfirmEdit/ReCaptchaNoCaptcha' 
) );
$wgCaptchaClass = 'ReCaptchaNoCaptcha';
$wgReCaptchaSiteKey = 'SiteKey.............';
$wgReCaptchaSecretKey = 'SecretKey...........';

Not sure how to deal with it - does anyone have any idea? A different 
MediaWiki install on the same server works fine for /Special:UserLogin.

Tomasz Chmielewski
https://lxadm.com