To address this issue, please follow the steps outlined below:
Go to the quick find in the setup
Search for "Session settings"
Locate the "Enable Content Delivery Network (CDN) for Lightning Component framework" and check the checkbox
Now scroll down and locate "Lightning Web Security" and check the checkbox
Save the changes
After completing these steps, navigate to PWR Components from the application manager, perform a hard refresh on the page to apply the latest changes and you should now be able to configure all components easily.
If you require any additional assistance, please do not hesitate to reach out. We are more than happy to help.