[TYPO3-english] Images are not showing in frontend

[ktt]

Hello,

After update to 4.5.2 images are not showing.
I copied image url and tried to open it, but got these errors:

Warning: require(PATH_typo3sysext/cms/ext_autoload.php) [function.require]: failed to open stream: No such file or directory in /www/htdocs/vb1812/typo3_src-4.5.2/t3lib/core_autoload.php on line 212

Warning: require(PATH_typo3sysext/cms/ext_autoload.php) [function.require]: failed to open stream: No such file or directory in /www/htdocs/vb1812/typo3_src-4.5.2/t3lib/core_autoload.php on line 212

Fatal error: require() [function.require]: Failed opening required 'PATH_typo3sysext/cms/ext_autoload.php' (include_path='.:/usr/share/php:..') in /www/htdocs/v111812/typo3_src-4.5.2/t3lib/core_autoload.php on line 212

All images in backend are editable and being shown correctly.
Maybe it is related to RealURL issues?

Thank you in advance.

Regards,
Kast A.