fix callBackend when response is null/undefined

1 files changed, 1 insertions, 1 deletions

diff --git a/src/wxApi.ts b/src/wxApi.ts
index f06ab69a7..b74cb9eb1 100644
--- a/src/wxApi.ts
+++ b/src/wxApi.ts
@@ -50,7 +50,7 @@ export function getReserveCreationInfo(baseUrl: string,
 export async function callBackend(type: string, detail?: any): Promise<any> {
   return new Promise<any>((resolve, reject) => {
     chrome.runtime.sendMessage({ type, detail }, (resp) => {
-      if (resp.error) {
+      if (resp && resp.error) {
         reject(resp);
       } else {
         resolve(resp);