Merge pull request #25821 from overleaf/jdt-handle-no-prem-src

Handle cases where Writefull is not defined on a user on the subscription page

GitOrigin-RevId: ef43da630b5194f6021ebfc52ca4cb473e674b23

services/web/app/src/Features/User/UserGetter.js

@@ -146,7 +146,7 @@ async function getWritefullData(userId) {
   }
   return {
     isPremium: Boolean(user?.writefull?.isPremium),
-    premiumSource: user.writefull.premiumSource || null,
+    premiumSource: user?.writefull?.premiumSource || null,
   }
 }