Using Post adaptive card and wait for a response, posting as Power Virtual Agent on a chat with the bot, fails with error:
BadRequest. The request failed. Response content: '{"id":"","messageLink":"","error":"Error converting value \"\" to type 'Microsoft.CCI.OnlineEngine.VirtualAgent.ServiceContracts.Models.ProactiveActiveChatCondition'. Path 'activeChat'. RequestId : 5fbc129b-f866-4c74-b1eb-6d303cb50865"}'.

If i use the exact same adaptive card payload, using the Post card on chat or channel, it works as expected and the card is shown correctly on the chat but, for my Flow, i definitely needed the answer.
Can you help?