[SalesForce] Permission set Assign issue for SalesforcePlatform license

No, you can't change the license, but you can clone the permission set using vs code.

Get your existing permission using package.xml

<types>
    <members>*</members>
    <name>PermissionSet</name>
</types>

Now, follow the below process to clone the Permission Set.

1. In the permission set folder, you will get the meta XML file for the permission set.
2. Copy and paste the file in the same folder, change the name to the desired name of the cloned permission set.
3. Change the label of the new permission set in the meta XML file.
4. Change the License Name of the new permission set in the meta XML file.
5. Now, deploy the new permission set.

See here is the example of meta XML file of the permission set, it contains all the settings.

<?xml version="1.0" encoding="UTF-8"?>
<PermissionSet xmlns="http://soap.sforce.com/2006/04/metadata">
    <hasActivationRequired>false</hasActivationRequired>
    <label>------Add the desired label here-----</label>
    <license>------Add the desired license here-----</license>
    <userPermissions>
        <enabled>true</enabled>
        <name>ViewRoles</name>
    </userPermissions>
    <userPermissions>
        <enabled>true</enabled>
        <name>ViewSetup</name>
    </userPermissions>
</PermissionSet>

It was not really clear from the announcement or from most of the documentation, but Salesforce Data Mask is actually a paid feature, and if you want to use it you need to talk to your Account Execute to purchase licenses.

As per the documentation on installing Salesforce Data Mask:

Ensure that your organization has the Data Mask User permission set licenses. Contact your Salesforce account executive to purchase more licenses.