Cannot run Cloudfoundry Task - Unexpected Response 404

This is not a CF CLI issue. Swisscom Application Cloud does not yet support the Cloud Foundry tasks. This explains the 404 you are currently receiving. We will expose this feature of Cloud Foundry in an upcoming release of Swisscom Application Cloud.

In the meantime, maybe you can find a way to execute your one-off tasks (cache warming, DB migrations) at application startup.