Heroku/Nuxt没有注意到混音？

我有一个按钮，可以重新指向条带签出页面-在我的本地机器上工作正常，但当我在生产中试用时，我在heroku日志中收到了这个错误：

2021-04-07T14:22:30.664437+00:00 app[web.1]:
2021-04-07T14:22:30.664454+00:00 app[web.1]: ERROR  Cannot read property 'subscriptions' of null
2021-04-07T14:22:30.664454+00:00 app[web.1]:
2021-04-07T14:22:30.664455+00:00 app[web.1]: at a.checkActiveSubscription (mixins/stripeSubscription.js:10:0)
2021-04-07T14:22:30.664455+00:00 app[web.1]: at a.hasAnyActiveSubscription (pages/profile/billing/index.vue:186:0)
2021-04-07T14:22:30.664456+00:00 app[web.1]: at a.hasAnyActiveSubscription (node_modules/vue/dist/vue.runtime.common.prod.js:6:29698)
2021-04-07T14:22:30.664457+00:00 app[web.1]: at a.render (pages/profile/billing/index.vue)
2021-04-07T14:22:30.664457+00:00 app[web.1]: at a.t._render (node_modules/vue/dist/vue.runtime.common.prod.js:6:35273)
2021-04-07T14:22:30.664458+00:00 app[web.1]: at node_modules/vue-server-renderer/build.prod.js:1:70637
2021-04-07T14:22:30.664458+00:00 app[web.1]: at Yi (node_modules/vue-server-renderer/build.prod.js:1:67201)
2021-04-07T14:22:30.664458+00:00 app[web.1]: at io (node_modules/vue-server-renderer/build.prod.js:1:70613)
2021-04-07T14:22:30.664458+00:00 app[web.1]: at ro (node_modules/vue-server-renderer/build.prod.js:1:70244)
2021-04-07T14:22:30.664459+00:00 app[web.1]: at eo (node_modules/vue-server-renderer/build.prod.js:1:67491)
2021-04-07T14:22:30.664459+00:00 app[web.1]:

Index.vue：

import checkActiveSubscription from "@/mixins/stripeSubscription.js";
export default {
    mixins: [checkActiveSubscription],
....
}

computed: {
   hasAnyActiveSubscription() {
     return this.checkActiveSubscription();
 },

stripeSubscription.js：

export default {
    methods: {
        checkActiveSubscription() {
            /* 
                check if user has any active subscription
                if so, the user should be able to manage their existing billing
                else - show buttons to create new subscription plans
            */

            let subscriptions = this.$store.getters.user.subscriptions;
            let hasActiveSubscription = false;
            subscriptions.some((element, index) => {
                if (element.status == "active") {
                    hasActiveSubscription = true;
                }
            });
            return hasActiveSubscription;
        },
    }
}

有什么建议吗？问题是关于Nuxt、Stripe还是Heroku

My Nuxt store看起来像这样（user.js位于名为store的文件夹中）：

并将用户提取到计算属性中，如下所示：

user() {
  return this.$store.getters.user;
},

---

从错误消息中，似乎

this.$store.getters.user

为空-设置在哪里？我将更新我的帖子

user() {
  return this.$store.getters.user;
},