Clear Cache doesn't work

[Philelis]

Message: file_get_contents(/language/de/.#FAQ.php): failed to open stream: No such file or directory
File: /includes/GeneralFunctions.php
Line: 388
URL: http://.../admin.php?page=clearcache
PHP-Version: 5.5.9-1ubuntu4.11
PHP-API: cgi-fcgi
MySQL-Cleint-Version: 5.5.44
2Moons Version: 1.7.2772
Debug Backtrace:

#0 [internal function]: errorHandler(2, 'file_get_conten...', 'FILEPATH ...', 388, Array)
#1 /includes/GeneralFunctions.php(388): file_get_contents('FILEPATH ...')
#2 /includes/pages/adm/ShowClearCachePage.php(34): ClearCache()
#3 /admin.php(178): ShowClearCachePage()
#4 {main}