error 404

src/content/collaborate/permalinks.mdx

@@ -108,3 +108,10 @@ As CAA records are inherited by subdomains, you can configure the CAA record at
 For more information about configuring CAA records, refer to [Let's Encrypt](https://letsencrypt.org/docs/caa/) and [ZeroSSL](https://help.zerossl.com/hc/en-us/articles/360060119753-Invalid-CAA-Records).
 
 </details>
+
+<details>
+<summary><b>My custom domain is "Connected", but the page hits error 404. Why?</b></summary>
+
+When you set a custom domain, you select a target branch, and the domain links to the most recent build on that branch. If the domain hits error 404, it's likely because the selected branch doesn't have any Chromatic builds yet.
+
+</details>