Fatal error when upgrading from 17.1 to 18.1
Hi Community,
I've tried this morning to upgrade from 17.1 to 18.1 using the "fresh install" method: created a new folder, unpacked the wiki application into it, copied current images to the new folder (no custom theme), made a clone of the current DB and finally called newfolder/tiki-install.php. The system is running Ubuntu 17.04LTS and PHP 7.
Unfortunately, I immediately received the following error: Fatal error:
Uncaught Error: Class 'Symfony\Component\DependencyInjection\Compiler\CheckDefinitionValidityPass' not found in /var/www/vhosts/bcasmart.com/httpdocs/twnew/vendor_bundled/vendor/symfony/dependency-injection/Compiler/PassConfig.php:58 Stack trace: #0 /var/www/vhosts/bcasmart.com/httpdocs/twnew/vendor_bundled/vendor/symfony/dependency-injection/Compiler/Compiler.php(31): Symfony\Component\DependencyInjection\Compiler\PassConfig->construct() #1 /var/www/vhosts/bcasmart.com/httpdocs/twnew/vendor_bundled/vendor/symfony/dependency-injection/ContainerBuilder.php(487): Symfony\Component\DependencyInjection\Compiler\Compiler->construct() #2 /var/www/vhosts/bcasmart.com/httpdocs/twnew/vendor_bundled/vendor/symfony/dependency-injection/ContainerBuilder.php(462): Symfony\Component\DependencyInjection\ContainerBuilder->getCompiler() #3 /var/www/vhosts/bcasmart.com/httpdocs/twnew/lib/init/initlib.php(104): Symfony\Component\DependencyInjection\ContainerBuilder->addCompilerPass(Object(Tiki\MailIn\Provider\CompilerPass)) in /var/www/vhosts/bcasmart.com/httpdocs/twnew/vendor_bundled/vendor/symfony/dependency-injection/Compiler/PassConfig.php on line 58
Being a newbie to sys admin, I'm seeking for help to solve this issue.
Thanks in advance for any help!