Thanks for your feedback. We have tried to reproduce this issue on our side, and we might’ve found the reason that causes the issue.
So, you should be good to go even with your existing data type, meaning it’s not mandatory to create a separate one specifically for the gantt chart. However, you just have to make sure that all fields match each other with plugin element settings.
For this one field:
I cannot find it in your database based on provided screenshot, unfortunately. But, it should not be an issue as this is an optional filed. If you need this data, just make sure it’s present in your database and it’s of type text.
Based on the following provided screenshot:
I can surely say that this is the reason why your gantt chart is not displaying any tasks. The Label field is a required one, so if you leave this field empty while inserting new records into your database, the gantt chart will ignore the task.
Please do make sure that when you create new records, you actually fill in with data for REQUIRED fields, based on our documentation.
Hope it helps.