来自JSON的元素不会在mat-table中输出

如何解决来自JSON的元素不会在mat-table中输出

我有一个JSON：

{
    "msg": "Unexpected templating type error occurred on ({{ mid_service.stdout[0] | regex_findall('\\\\S+\\\\s+Stopped\\\\b.*') | regex_findall('snc_mid_[a-zA-Z0-9_]*') }}): expected string or bytes-like object","_ansible_no_log": false
}

我想在垫子表格的列中输出金额。我编写了以下函数：

{
    "monthlySusa": [
        [
            {
                "accountlinevaluesId": 1,"accountlineId": 1,"mandantKagId": 660,"mandantAccountsId": 1,"period": "7","accountNumber": 27,"name": "EDV-Hardware/Software","amount": 55.16859,"note": "Ich bin ein Kommentar!","mandantKagAccountEntity": {
                    "mandantKagId": 660,"mandantId": 1,"kagNumber": "2000","kagText": "A. I. 1. EDV-Software"
                }
            }
        ]
    ],"success": true
}

我的HTML

public getoutputAmount() {
    const monthStr = `${this.month}`;
    this.balanceListService.getDataForMonthlyAmount(`${this.year}`,monthStr).subscribe(
      (resp: any) => {
        const data = resp.monthlySusa;
        if (data && data.length > 0) {
          const monthlySusaPeriods = resp.monthlySusa[0];
          const rows = [];
          for (const ac of monthlySusaPeriods) {
            const row = ac.amount;
            rows.push(row);
            console.log('Amount:',ac.amount);
          }
          this.dataSource.data = rows;
        }
      });
  }

我现在遇到的问题是我获得了控制台输出，但不在表中！您能帮我一下，告诉我我做错了什么，或者我应该改善自己的代码。