[designer] Template expansion error: Cannot read properties of undefined (reading 'dataType')

[becory]

Hi, @anna-dingler
I upgrade the version from 2.3.0 to 2.4.3.
found this error.

Template expansion error: Cannot read properties of undefined (reading 'dataType')

AdaptiveCards/source/nodejs/adaptivecards-designer/src/card-designer-surface.ts

Line 319 in 45caa27

console.log("Template expansion error: " + e.message);

I can't preview my sample data in the designer.
Is this a breaking change?
Could you tell me what can I do?

[anna-dingler]

Hi @becory,

Can you send me your card payload and the data?

[becory]

Hi @anna-dingler, I used the same payload and the data from the designer demo website.
https://adaptivecards.io/designer/

On the other hand, I found I can't drop any element from the left side menu in 2.4.3.

[anna-dingler]

@becory The drag and drop behavior should be working as expected. Are you editing in design mode?