1. PHP REQUIREMENT LINK: https://docs.formtools.org/userdoc/getting_started/system_requirements/
2. Upgrade Guide: https://docs.formtools.org/upgrading/
3. Few tables related to Data Visualization and Form Builder modules are not created post upgrading 2.2.6 => 3.0.1 (Comfirm with vendor) as they are optional and will generate if source installation has these modules activated.