Can't load a project with Gantt chart

In which chart does the bug happen?

• Gantt chart

RAWGraphs Version

RAWGraphs 2.0

Web browser and version

Chrome

Operating System

Mac os

Steps to reproduce this

• I create a project using a Gantt chart
• I export the project .rawgraphs
• I upload the project
• Error: Can't open your project. Can't open your project. Selected project is not valid

Project file

GanttChart.zip

Additional context