Getting Invalid configuration for a domain and its subdomain

Help
1

Recently I started getting Invalid Configuration for my sub domains. Suppose my domain is xyz.com

xyz.com shows correctly configured in Vercel dashboard
www.xyz.com also shows correctly configured (this is redirect to xyz.com)
*.xyz.com shows Invalid Configuration

Now I have added below configuration in namecheap (domain purchasing source)

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I have also checked domain in https://dnschecker.org/ and it shows the domain is correctly propagated.

I am not able to understand what is wrong here. Things were working fine till 9th May 2025 and it started showing Invalid Configuration after that.

2

Hello,

What is the name of the domain?

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3

Hey. The domain is fabricapp.co

4

I can see that the DNS is propagated and domain is accessible already. Are you still seeing error?

5

Yes all the subdomains are still red with a Invalid Configuration message.

6

Looks like you have *.fabricapp.co configured with a CNAME record, but wildcard domains need to use Vercel nameservers to automatically generate SSL certificates.

Please give that a try and let us know how it goes :slightly_smiling_face:

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7

Yes this worked. Thank you so much. Just curious if anything changed recently as this was working before. The only change I did was added the ‘*’ record in namecheap domain records that too after I started seeing invalid config error. But before this, the same config was working from a very long time.

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8

No it was always been the case Why must we use the Domain Nameservers method for Wildcard Domains on Vercel?

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9

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