Error 'Test failed to run' with AI Assistant using OpenRouter Integration

Hello,

I'm currently utilizing Elastic's AI Assistant with a trial license and have integrated OpenRouter as the AI provider. However, when entering the OpenRouter URL and the corresponding API Key, I encounter the following error:​

Test failed to run
The following error was found:
an error occurred while running the action
Details:
Response validation failed (Error: could not parse object value from json input)

Could this issue be related to licensing, considering I'm using a trial license with Elastic Stack version 8.17.4?

Thank you in advance for your assistance!