AWS LexV2 CDK/CloudFormation error when using Image Response Cards - amazon-web-services

Question

I am deploying a Lex V2 bot with AWS CDK and want my bot to have buttons for eliciting slots, but for some reason I get an error:
DevBot Resource handler returned message:
"Importing CDK-DevBot failed due to [There was an error importing the bot.
Make sure that the imported bot and contents of the zip file are correct, then try your request again.].
The import could not be completed."
(RequestToken: ebd3354f-6169-922a-d0f9-d14690671e25, HandlerErrorCode: InvalidRequest)
This error is not very informative. The relevant part of the CloudFormation template: "Message"
"MessageGroupsList: [{
"Message": {
"ImageResponseCard": {
"Buttons": [
{
"Text": "1.0.3",
"Value": "1.0.3"
},
{
"Text": "1.0.5",
"Value": "1.0.5"
}
],
"Title": "Title"
},
"PlainTextMessage": {
"Value": "Please enter the issue number"
}
}
}]
If I remove "ImageResponseCard" then it deploys okay. Otherwise, I get the error.
Has anybody else had this problem and found a way to overcome it?

Answer 1

The MessageGroupList is an array of Message elements. Every element must have a different type of Message that could be ImageResponseCard or PlainTextMessage. So in your case the template has an incorrect structure, it should be something like that:
{
"MessageGroupsList": [
{
"Message": {
"ImageResponseCard": {
"Buttons": [
{
"Text": "1.0.3",
"Value": "1.0.3"
},
{
"Text": "1.0.5",
"Value": "1.0.5"
}
],
"Title": "Title"
}
}
},
{
"Message": {
"PlainTextMessage": {
"Value": "Please enter the issue number"
}
}
}
]
}
Assumming that the missing tick in MessageGroupList is a typo.