Explanation of the error
This Salesforce error can occur when deploying DigitalExperienceConfig metadata. Specifically, it refers to the custom URL of the configuration.
This occurs if the custom URL is not valid. If the custom URL is set to the root or blank, this is considered not valid by Salesforce.
An example of the error message in our app:
The value for urlPathPrefix in DigitalExperienceConfig isn't valid. Check the value and try again.
Resolution
To resolve this, you'll need to make sure the Digital Experience bundle has a custom URL, as a blank custom URL is not valid. You'll also need to make sure the custom URL is valid for your org.
Try adding the URL and attempting deployment again.
If this doesn't change anything, please send a message to our support team, who will be happy to help.
Disclaimer: This error is returned by Salesforce directly, rather than Gearset. Even so, we offer guidance based on our combined experience with the Metadata API. Where possible, we try to help guide you to fix or avoid this error. In the case that this isn't possible, we may need to direct you to Salesforce support for further clarification.