I have encountered an issue when attempting to open the Gantt chart from the Salesforce app on my iPad. I consistently receive an error popup with this specific error message. This error only occurs when I try to open the Gantt chart from the Salesforce app, while it works perfectly fine when accessed through a browser.
Specifically, when I try to interact (such as zooming in or zooming out) with the chart, I receive these popup messages. They persist, and it wont disappear making the gantt unusable.