I got 500 server error after upgrading to 4.0.0

[Michael]

Hi I installed the EspoCRM on Bluhost.

After upgrading to 4.0.0, i got the 500 Server Error.
500 Server Error

A misconfiguration on the server caused a hiccup. Check the server logs, fix the problem, then try again.

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URL: http://www.merrilyprom.com/espocrm1/

I looked at the log file and it shows:
[2016-03-08 07:21:56] Espo.WARNING: E_WARNING: include(data/config.php): failed to open stream: No such file or directory {"file":"/home3/merrilyp/public_html/espocrm1/application/Espo/Core/Utils/Config.php","line":159} [] [2016-03-08 07:21:56] Espo.WARNING: E_WARNING: include(): Failed opening 'data/config.php' for inclusion (include_path='/home3/merrilyp/public_html/espocrm1/vendor/phpunit/php-token-stream:/home3/merrilyp/public_html/espocrm1/vendor/phpunit/php-text-template:/home3/merrilyp/public_html/espocrm1/vendor/phpunit/phpunit-mock-objects:/home3/merrilyp/public_html/espocrm1/vendor/phpunit/php-timer:/home3/merrilyp/public_html/espocrm1/vendor/phpunit/php-code-coverage:/home3/merrilyp/public_html/espocrm1/vendor/phpunit/phpunit:/home3/merrilyp/public_html/espocrm1/vendor/symfony/yaml:/home3/merrilyp/public_html/espocrm1') {"file":"/home3/merrilyp/public_html/espocrm1/application/Espo/Core/Utils/Config.php","line":159} [] [2016-03-08 07:25:33] Espo.WARNING: E_WARNING: Invalid argument supplied for foreach() {"file":"/home3/merrilyp/public_html/espocrm1/data/upload/upgrades/56de7e64c0666/scripts/AfterUpgrade.php","line":52} [] Please advise what I can do.

Thanks.
Michael

[yuri]

Hi

check permissions
data/config.php - 664
data - 775
index.php - 644

[Michael]

Thank you very much. I changed the index.php from 664 to 644. Then it works.