The error message shows, "You don't have access to the template file. Access to the template file requires permission to read the OFC_Template record.".

Grant permissions to users for OFC_Template object and OFC_Child Object Option object.

Guest User in Experience Cloud

For guest users, the organization's share settings are set to private for all objects. Access permissions to the OFC_Template object for guest users require the sharing rule. See the Salesforce help below for more information.

Best Practices and Considerations When Configuring the Guest User Profile

Create Guest User Sharing Rules

Test Guest User Access in Your Experience Cloud Site