Thanks for getting in touch! I suspect your Tentacles aren’t being considered healthy in time for the deployment to them. If you add a health check step in your deployment process, after the step that enables the Tentacles, that should do the trick.
A similar process has been outlined in our immutable infrastructure documentation as well.
If instead you’re trying to initiate the deployment when no Tentacles are available, you can configure your project to allow this by selecting the Deployment Target settings option in your project’s Process tab. You can then check Allow deployments to be created when there are no deployment targets as shown in my attached screenshot.
Let me know how you go and if you have any further questions!