We cannot convert "Accountsync" to type record

Hello everyone,

I get this error in this code:

let
source = Web.Contents("https://localhost:44346/WeatherForecast/TableList"),
json = Json.Document(Text.FromBinary(source)),
convertToTable = Table.FromList(json, Splitter.SplitByNothing(), null, null, ExtraValues.Error),
columnNames = Record.FieldNames(Table.FirstValue(convertToTable)),
ExpandedColumn1 = Table.ExpandRecordColumn(convertToTable, "Column1", columnNames),
selectColumn = Table.Column(ExpandedColumn1, columnNames{0})
in
selectColumn;

This is the data in "source = Web.Contents("https://localhost:44346/WeatherForecast/TableList":

[  "AccountSync",  "AggregateState",  "BatchQueue",  "BatchSchedule",  "Binaries",  "BinaryStoreVersion",  "CategoryRiskTotals",  "ClientEvents",  "ClientEventStoreLastEvents",  "Departments",  "Logs",  "MultiSelect",  "Organizations",  "PitStopDayTotals",  "PitStopMonthTotals",  "ProjectionBuilderShard",  "ProjectionBuilderVersion",  "ProjectionStoreVersion",  "QuestionRiskTotals",  "RiskTotals",  "SitStandDayTotals",  "SitStandMonthTotals",  "Streams",  "StreamStoreVersion",  "Surveys",  "SurveyTemplates",  "SurveyUsers",  "UserDepartments",  "UserQuestionRisks",  "UserRiskTotals",  "Users"
]

 But when I get data from "source = Web.Contents("https://localhost:44346/WeatherForecast/" it works perfectly fine, which contains the data:

[  {
    "date": "2021-11-19T14:34:51.8028071+01:00",    "temperatureC": 1,    "temperatureF": 33,    "summary": "Freezing"
  },
  {
    "date": "2021-11-20T14:34:51.8033779+01:00",    "temperatureC": 21,    "temperatureF": 69,    "summary": "Cool"
  },
  {
    "date": "2021-11-21T14:34:51.8033806+01:00",    "temperatureC": -13,    "temperatureF": 9,    "summary": "Hot"
  },
  {
    "date": "2021-11-22T14:34:51.803381+01:00",    "temperatureC": 40,    "temperatureF": 103,    "summary": "Warm"
  },
  {
    "date": "2021-11-23T14:34:51.8033812+01:00",    "temperatureC": 20,    "temperatureF": 67,    "summary": "Cool"
  }
]

Do I need to change the Splitter.SplitByNothing() parameter? If yes, what do I need to change? If no, what else do I have to change in the code?

Thank you.