1. Yes the cloud manager validator would give an error in this case as only 'rewrites' and 'variables' files can be specified as includes vhost configuration files:
2. While converting from AMS to AEM cloud dispatcher, it is mentioned to "Remove allowlists"
- Remove the folder conf.d/whitelists and remove Include statements in the virtual host files referring tosome file in that subfolder.
3. You can refer/ use Dispatcher Converter Tool if trying to migrate from AMS dispatcher configs to AEM cloud:
did you included in ghost file with full path?
(space between Include try with tab space also)
you can directly include it in respective domain vhost file and try (instead of default.vhost)