MediaWiki internal error.
Original exception: exception 'MWException' with message 'Detected bug in an extension! Hook Stub::hSkinTemplateTabs failed to return a value; should return true to continue hook processing or false to abort.' in /var/www/webapps/cobra/includes/Hooks.php:155
Stack trace:
#0 /var/www/webapps/cobra/includes/SkinTemplate.php(863): wfRunHooks('SkinTemplateTab...', Array)
#1 /var/www/webapps/cobra/includes/SkinTemplate.php(490): SkinTemplate->buildContentActionUrls()
#2 /var/www/webapps/cobra/includes/OutputPage.php(1615): SkinTemplate->outputPage(Object(OutputPage))
#3 /var/www/webapps/cobra/includes/Wiki.php(376): OutputPage->output()
#4 /var/www/webapps/cobra/includes/Wiki.php(161): MediaWiki->finalCleanup(Array, Object(OutputPage))
#5 /var/www/webapps/cobra/includes/Wiki.php(59): MediaWiki->preliminaryChecks(Object(Title), Object(OutputPage), Object(WebRequest))
#6 /var/www/webapps/cobra/index.php(117): MediaWiki->performRequestForTitle(Object(Title), NULL, Object(OutputPage), Object(User), Object(WebRequest))
#7 {main}
Exception caught inside exception handler: exception 'MWException' with message 'Detected bug in an extension! Hook Stub::hSkinTemplateTabs failed to return a value; should return true to continue hook processing or false to abort.' in /var/www/webapps/cobra/includes/Hooks.php:155
Stack trace:
#0 /var/www/webapps/cobra/includes/SkinTemplate.php(863): wfRunHooks('SkinTemplateTab...', Array)
#1 /var/www/webapps/cobra/includes/SkinTemplate.php(490): SkinTemplate->buildContentActionUrls()
#2 /var/www/webapps/cobra/includes/OutputPage.php(1615): SkinTemplate->outputPage(Object(OutputPage))
#3 /var/www/webapps/cobra/includes/Exception.php(164): OutputPage->output()
#4 /var/www/webapps/cobra/includes/Exception.php(191): MWException->reportHTML()
#5 /var/www/webapps/cobra/includes/Exception.php(289): MWException->report()
#6 /var/www/webapps/cobra/includes/Exception.php(348): wfReportException(Object(MWException))
#7 [internal function]: wfExceptionHandler(Object(MWException))
#8 {main}