Fatal error: Uncaught exception 'InvalidArgumentException' with message 'The directory "/var/websites/importantsolution.com/htdocs/piwik/tmp/cache/tracker/" is not writable.' in /var/websites/importantsolution.com/htdocs/piwik/vendor/doctrine/cache/lib/Doctrine/Common/Cache/FileCache.php:92
Stack trace:
#0 /var/websites/importantsolution.com/htdocs/piwik/vendor/doctrine/cache/lib/Doctrine/Common/Cache/PhpFileCache.php(37): Doctrine\Common\Cache\FileCache->__construct('/var/websites/i...', '.php', 2)
#1 /var/websites/importantsolution.com/htdocs/piwik/vendor/piwik/cache/src/Backend/File.php(40): Doctrine\Common\Cache\PhpFileCache->__construct('/var/websites/i...', '.php')
#2 /var/websites/importantsolution.com/htdocs/piwik/vendor/piwik/cache/src/Backend/Factory.php(22): Piwik\Cache\Backend\File->__construct('/var/websites/i...')
#3 /var/websites/importantsolution.com/htdocs/piwik/vendor/piwik/cache/src/Backend/Factory.php(96): Piwik\Cache\Backend\Factory->buildFileCache(Array)
#4 /var/websites/importantsolution.com/htdocs/ in /var/websites/importantsolution.com/htdocs/piwik/vendor/doctrine/cache/lib/Doctrine/Common/Cache/FileCache.php on line 92