[TYPO3-english] Frontend login error DefaultCaseViewHelper does not exist

[Dmitry]

Hi,
I use TYPO3 7.6.18 and PHP 7.0. I have problem with frontend login. I have following error on page where frontend login installed.

#1289386765: Could not analyse class: "TYPO3\CMS\Fluid\ViewHelpers\DefaultCaseViewHelper" maybe not loaded or no autoloader? Class TYPO3\CMS\Fluid\ViewHelpers\DefaultCaseViewHelper does not exist 

TYPO3 is installed in the standard way, not via composer.
-- 
Kind regards,
Dmitry Vasilev
www: http://typo3.ru.net/
Skype: thule-varahi;
Phone: +7 950 001 85 15