I did some changes on my magento installation (inside admin panel) but for no logical reason my magento showed me HTTP ERROR 500 I am trying the commands php bin/magento setup:upgrade but everything going ok. Can anyone help me for what is that happend? I tried to reindex and to flush cache. My installation is based on plesk and centos 7 Thank you

Suspicious Server Logs from Plesk: 1)Apache error

AH01071: Got error 'PHP message: PHP Fatal error: Uncaught 
Zend_Cache_Exception: cache_dir 
"/var/www/vhosts/domain/httpdocs/var/cache/" is not writable in /var/www/vhosts/domain/httpdocs/vendor/magento/zendframework1/library/Zend/Cache.php:209\nStack trace:\n#0 /var/www/vhosts/domain/httpdocs/vendor/magento/zendframework1/library/Zend/Cache/Backend/File.php(180): Zend_Cache::throwException('cache_dir "/var...')\n#1 /var/www/vhosts/domain/httpdocs/vendor/colinmollenhour/cache-backend-file/File.php(87): Zend_Cache_Backend_File->setCacheDir('/var/www/vhosts...')\n#2 /var/www/vhosts/domain/httpdocs/vendor/magento/zendframework1/library/Zend/Cache.php(153): Cm_Cache_Backend_File->__construct(Array)\n#3 /var/www/vhosts/domain/httpdocs/vendor/magento/zendframework1/library/Zend/Cache.php(94): Zend_Cache::_makeBackend('Cm_Cache_Backen...', Array, true, true)\n#4 /var/www/vhosts/domain/httpdocs/vendor/magento/framework/App/Cache/Frontend/Factory.php(155): Zend_Cache::factory('Magento\\\\Framewo...', 'Cm_Ca...\n'
  • Anything in your system.log or exception.log?
    – DanCarlyon
    May 14, 2018 at 14:46
  • Also what did you save in the admin? This does count as a change so i have suggested an edit to your title
    – DanCarlyon
    May 14, 2018 at 14:47
  • @dancarlyon No there is no such a file on my /var/log system May 14, 2018 at 14:47
  • I would be looking to your server error logs for more information
    – DanCarlyon
    May 14, 2018 at 14:48
  • @DanCarlyon I was trying to update the logo of transactional emails May 14, 2018 at 14:48

2 Answers 2


The error says it: your cache folder is not writable.

Make sure the folder /var/www/vhosts/domain/httpdocs/var/cache/ is writable:

sudo chmod a+w /var/www/vhosts/domain/httpdocs/var/cache/


Based on your updated question it seems your permissions are incorrect on your var/cache directory.

Make sure they are correct and have read-write permissions.

If you have ssh access you can do this with

chmod 777 /var/www/vhosts/domain/httpdocs/var/cache/


The below command will set all directories to 770 and all files to 660

sudo find . -type d -exec chmod 770 {} \; && sudo find . -type f -exec chmod 660 {} \; && sudo chmod u+x bin/magento

You can see more about this on the magento devdocs

  • I tried it but nothing changed May 14, 2018 at 14:58
  • Best bet would be to re-check the server error logs as there may be another directory that has incorrect permissions, eg generation.
    – DanCarlyon
    May 15, 2018 at 5:45

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