Fix hook being called conditionally.

src/pages/Driver.jsx

@@ -45,18 +45,22 @@ function Driver({ match }) {
     const {
         pointsMultiTeam
     } = useContext(YearContext);
-    if(!pointsMultiTeam) {
-        return null;
-    }
 
     const driver = match.params.driver?.toUpperCase();
 
     const sortedPoints = useMemo(() => {
+        if(!pointsMultiTeam) {
+            return [];
+        }
         return Object.entries(pointsMultiTeam.drivers).sort((driverEntry1, driverEntry2) => {
             return driverEntry2[1] - driverEntry1[1];
         });
     }, [pointsMultiTeam]);
 
+    if(!pointsMultiTeam) {
+        return null;
+    }
+
     return (
         <div className="container mt-3">
             <div className="my-3">