How to save and send inline editing to the server
Gantt is a client-side library, it doesn’t directly communicate with the database or the server-side. All changes occur only inside the browser.
To send the changes to the server, you need to use the Data Processor or built-in Ajax module. You can read more about it in the following articles:
When you edit a task via an inline editor, Gantt updates the task object. If you connected the Data Processor, Gantt will send the changes to the server. With the Ajax module, you need to manually send the changes to the server.