Wikimedia Bugzilla is closed!

The Book Creator (Collections) extension on the main Wikipedia site is blocked and does not execute as expected. 

SitRep: The user interface on the main Wikipedia site generates the statement:
Unexpected non-MediaWiki exception encountered, of type "UsageException"
badtoken: Invalid token

#0 /usr/local/apache/common-local/php-1.18/includes/api/ApiBase.php(1205): ApiBase->dieUsage('Invalid token', 'badtoken')
#1 /usr/local/apache/common-local/php-1.18/includes/api/ApiMain.php(590): ApiBase->dieUsageMsg('sessionfailure')
#2 /usr/local/apache/common-local/php-1.18/includes/api/ApiMain.php(678): ApiMain->setupModule()
#3 /usr/local/apache/common-local/php-1.18/includes/api/ApiMain.php(340): ApiMain->executeAction()
#4 /usr/local/apache/common-local/php-1.18/extensions/Collection/Collection.body.php(867): ApiMain->execute()
#5 /usr/local/apache/common-local/php-1.18/extensions/Collection/Collection.body.php(225): SpecialCollection->saveCollection(Object(Title), false)
#6 /usr/local/apache/common-local/php-1.18/includes/SpecialPageFactory.php(460): SpecialCollection->execute(NULL)
#7 /usr/local/apache/common-local/php-1.18/includes/Wiki.php(224): SpecialPageFactory::executePath(Object(Title), Object(RequestContext))
#8 /usr/local/apache/common-local/php-1.18/includes/Wiki.php(624): MediaWiki->performRequest()
#9 /usr/local/apache/common-local/php-1.18/includes/Wiki.php(531): MediaWiki->main()
#10 /usr/local/apache/common-local/php-1.18/index.php(57): MediaWiki->run()
#11 /usr/local/apache/common-local/live-1.5/index.php(3): require('/usr/local/apac...')
#12 {main}

This occurs at the point of executing the Special:Book output page as called from with the application when completing the save book function. 

Situation does not provide any further details concerning the nature of the exception or if the user namespace has appropriate authorization to fix the exception.