fixed error preventing LOA form from providing user feedback on submit when used from admin panel

ui/src/api/loa.ts

@@ -31,9 +31,9 @@ export async function adminSubmitLOA(request: LOARequest): Promise<{ id?: number
     });
 
     if (res.ok) {
-        return res.json();
+        return
     } else {
-        return { error: "Failed to submit LOA" };
+        throw new Error("Failed to submit LOA");
     }
 }