Although I installed (and imported) the module with the command: npm install adaptive-expressions adaptivecards-templating --save. When I go to run my application I get the following error:
To use AdaptiveCards with templating and expressions you need to install these 3 packages:
https://www.npmjs.com/package/adaptivecards
https://www.npmjs.com/package/adaptivecards-templating
https://www.npmjs.com/package/adaptive-expressions
ie
npm install adaptivecards adaptivecards-templating adaptive-expressions --save
You also have to import all 3 packages properly.
you don't necessarily need templating if you dont use it but minimum the normal adaptivecards package. Otherwise you'll run into errors permanently.