Fix not found appearing on share pages.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "umami",
-  "version": "0.10.0",
+  "version": "0.10.1",
   "description": "A simple, fast, website analytics alternative to Google Analytics. ",
   "author": "Mike Cao <mike@mikecao.com>",
   "license": "MIT",

pages/share/[...id].js

@@ -16,7 +16,7 @@ export default function SharePage() {
 
     if (website) {
       setWebsiteId(website.website_id);
-    } else {
+    } else if (typeof window !== 'undefined') {
       setNotFound(true);
     }
   }