Why do I get an error that my PodSecurityConfiguration is not valid?

When you use the ibmcloud ks cluster master pod-security set command with the --config-file option, you see an error similar to the following example.

`The 'configuration' field is not a valid Kubernetes PodSecurityConfiguration setting. See 'http://ibm.biz/iks-psa-config' for more information.

There is a problem with the pod security configuration file. The content of this file is described in Pod Security Admission plug-in configuration.

Types of errors can include:

• YAML formatting errors such as indentation or using tab characters instead of spaces for indentation.
• The apiVersion or kind fields are missing or have incorrect values.
• A field name is not spelled correctly.
• A field has an incorrect value.

Check the configuration file for these kinds of errors. Correct any errors you find and try the command again.