So in this case, as you need the records on your primary domain for your emails, you won't be able to configure a CNAME record on your primary domain, this is simply not possible due to how this record type works. The best alternative to this would be configuring an ALIAS record instead, which I can see you've done and when visiting 'welfareaid.org' it is loading to Railways server, however there is an error occurring. I would suggest reaching out to railway to see if the ALIAS record will be sufficient, and to ensure there aren't any further misconfigurations on your hosting service with them. If an ALIAS cannot be used, you may need to consider alternatives or reevaluate how you have this setup