get openid fail Error: cloud.callFunction:fail Error: errCode: -504002 functions execute fail | errMsg: ReferenceError: wx is not defined     at Object.<anonymous> (:12168/var/user/index.js:3)     at Module._compile (:12168/appservice/internal/modules/cjs/loader.js:1158)     at Object.Module._extensions..js (:12168/appservice/internal/modules/cjs/loader.js:1178)     at Module.load (:12168/appservice/internal/modules/cjs/loader.js:1002)     at Function.Module._load (:12168/appservice/internal/modules/cjs/loader.js:901)     at Module.require (:12168/appservice/internal/modules/cjs/loader.js:1044)     at require (:12168/appservice/internal/modules/cjs/helpers.js:77)     at Object.module.exports.load (:12168/var/runtime/node12/UserFunction.js:26)     at Runtime.handleOnce (:12168/var/runtime/node12/Runtime.engine.js:99)     at Timeout._onTimeout (:12168/var/runtime/node12/Runtime.engine.js:56) (callId: 1659562043691-0.015394991480191855) (trace: 5:27:23 start->5:27:23 app show->5:27:24 system error (Error: errCode: -504002 functions execute fail | errMsg: ReferenceError: wx is not defined     at Object.<anonymous> (:12168/var/user/index.js:3)     at Module._compile (:12168/appservice/internal/modules/cjs/loader.js:1158)     at Object.Module._extensions..js (:12168/appservice/internal/modules/cjs/loader.js:1178)     at Module.load (:12168/appservice/internal/modules/cjs/loader.js:1002)     at Function.Module._load (:12168/appservice/internal/modules/cjs/loader.js:901)     at Module.require (:12168/appservice/internal/modules/cjs/loader.js:1044)     at require (:12168/appservice/internal/modules/cjs/helpers.js:77)     at Object.module.exports.load (:12168/var/runtime/node12/UserFunction.js:26)     at Runtime.handleOnce (:12168/var/runtime/node12/Runtime.engine.js:99)     at Timeout._onTimeout (:12168/var/runtime/node12/Runtime.engine.js:56)), abort)     at S (WASubContext.js?t=wechat&s=1659560544268&v=2.24.1:2)     at WASubContext.js?t=wechat&s=1659560544268&v=2.24.1:2     at WASubContext.js?t=wechat&s=1659560544268&v=2.24.1:2     at n (WASubContext.js?t=wechat&s=1659560544268&v=2.24.1:2) 突然间出现这个问题，云函数不能使用了，是什么原因呢？