Magento 2 - Ongoing issue correction + extension installation

Hello I´m looking for a Magento 2 expert that can help me solve different issues and errors. I will also need help with installation and setup of different extensions. Magento 2 is installed on a testsite, and will be moved to the livesite when the site is complete and ready. In the moment I have one error that need to be solved. It is importent that you are ready to install and setup extensions when I get them and ofcource be able to solve ongoing issues :) The error I have right now is listed below and accurs when I try to access Web Setup Wizard in the backend: Fatal error: Uncaught Exception: Warning: ini_set(): Cannot find save handler 'db' in /home/flagshop/public_html/vendor/magento/framework/Session/[login to view URL] on line 570 in /home/flagshop/public_html/vendor/magento/framework/App/[login to view URL] Stack trace: #0 [internal function]: Magento\Framework\App\ErrorHandler->handler(2, 'ini_set(): Cann...', '/home/flagshop/...', 570, Array) #1 /home/flagshop/public_html/vendor/magento/framework/Session/[login to view URL](570): ini_set('session.save_ha...', 'db') #2 /home/flagshop/public_html/vendor/magento/framework/Session/[login to view URL](184): Magento\Framework\Session\SessionManager->initIniOptions() #3 /home/flagshop/public_html/generated/code/Magento/Backend/Model/Auth/Session/[login to view URL](167): Magento\Framework\Session\SessionManager->start() #4 /home/flagshop/public_html/vendor/magento/framework/Session/[login to view URL](130): Magento\Backend\Model\Auth\Session\Interceptor->start() #5 /home/flagshop/public_html/vendor/magento/module-backend/Model/Auth/Ses in /home/flagshop/public_html/vendor/magento/framework/App/[login to view URL] on line 61 Let me know if you have any questians :) Thanks Jack Pedersen