The installer needs to more carefully validate the clouds.yaml that is passed to it to make sure that it has the required fields. In its current form, you can pass clouds.yaml files in configurations that are not supported, or lack required values for the installer to work, and the installer does not report an error. This results in confusing errors later down the line in the install in OpenShift components.
*** Bug 1894561 has been marked as a duplicate of this bug. ***
This is tracked as a feature in https://issues.redhat.com/browse/OSASINFRA-2152 Closing.