Template Configuration Issues: The template might not be correctly configured or is not enabled.
Template Permissions: The template may not have the necessary permissions, or the user might not have the rights to access the template.
Template Location: The template is not in the correct folder structure or is not linked to the corresponding page structure.
Solutions:
Check Template Configuration: Ensure the template is correctly configured in AEM's Template Editor. It should be associated with a Template Type and allowed for the relevant page components.
Verify Permissions: Check the permissions for the template. Make sure that the user role attempting to create the page has access to the template.
Validate Template Path: Make sure the template is placed in the appropriate location within the /conf folder structure, which is aligned with the AEM Sites structure.