Cannot read properties of undefined (reading 'delete')

[MarcSkovMadsen]

panel==1.4.2

I'm working on a complex Panel app using Perspective and other components.

When it loads it works fine.

But when I select a different backtest in the sidebar it crashes

At least you will have to handle the case where this.perspective_element is undefined.

I hope I can contribute a minimal, reproducible example later.

[MarcSkovMadsen]

I can see that the problem is that Perspective has not been rendered before its removed because it sits in a part of the Accordion that is not expanded. Thus this.perspective_element has never been defined.