if you change the path of the TYPO3 installation you might see something like this:
Warning: Unable to access /www/htdocs/typo3/32/testsite-3.6.0/typo3conf//www/htdocs/typo3/32/testsite-3.6.0/admindir/sysext/cms/tbl_cms.php in /www/htdocs/typo3/32/typo3_src-3.6.0RC1/t3lib/class.t3lib_div.php on line 2745Warning: Unable to access /www/htdocs/typo3/32/testsite-3.6.0/typo3conf//www/htdocs/typo3/32/testsite-3.6.0/admindir/sysext/cms/tbl_cms.php in /www/htdocs/typo3/32/typo3_src-3.6.0RC1/t3lib/class.t3lib_div.php on line 2745Warning: Failed opening '/www/htdocs/typo3/32/testsite-3.6.0/typo3conf//www/htdocs/typo3/32/testsite-3.6.0/admindir/sysext/cms/tbl_cms.php' for inclusion (include_path='.:/usr/local/lib/php') in /www/htdocs/typo3/32/typo3_src-3.6.0RC1/t3lib/class.t3lib_div.php on line 2745....
That will go on for pages. The problem is that absolute filepaths are hardcoded inside the files.
Fix: Manuall remove the temp_CACHED_*.php files manually via FTP or the filesystem. Then hit the page again.