Thread:Project:Current issues/Format html is not supported for content model wikitext

I've problem when I'm trying add article on my installation. Version: 1.21.2

Error message with $wgShowExceptionDetails = true; :

Format html is not supported for content model wikitext

Backtrace:


 * 1) 0 /public_html/includes/content/WikitextContentHandler.php(38): ContentHandler->checkFormat('html')
 * 2) 1 /public_html/includes/content/ContentHandler.php(159): WikitextContentHandler->unserializeContent('== Getting star...', 'html')
 * 3) 2 /public_html/includes/EditPage.php(2071): ContentHandler::makeContent('== Getting star...', Object(Title), 'wikitext', 'html')
 * 4) 3 /public_html/includes/EditPage.php(1360): EditPage->toEditContent('== Getting star...')
 * 5) 4 /public_html/includes/EditPage.php(1187): EditPage->internalAttemptSave(false, false)
 * 6) 5 /public_html/includes/EditPage.php(416): EditPage->attemptSave
 * 7) 6 /public_html/includes/actions/EditAction.php(59): EditPage->edit
 * 8) 7 /public_html/includes/actions/EditAction.php(86): EditAction->show
 * 9) 8 /public_html/includes/Wiki.php(439): SubmitAction->show
 * 10) 9 /public_html/includes/Wiki.php(305): MediaWiki->performAction(Object(Article), Object(Title))
 * 11) 10 /public_html/includes/Wiki.php(565): MediaWiki->performRequest
 * 12) 11 /public_html/includes/Wiki.php(458): MediaWiki->main
 * 13) 12 /public_html/index.php(59): MediaWiki->run
 * 14) 13 {main}