Gantt Chart Visual not showing data

Hello Everyone,

I use Power BI to display tasks in a planning meeting. I use a list as well as a Gantt Chart and without any changes from last week where it all worked, the list is displaying all data but the Gantt Chart is showing no data. The legend shows up but no data is in the chart. Does anyone know how to fix this? It appears to be receiving the data but not displaying it, as my filtering Slicers still work and change the legend etc. when altered. Please help!