[Expression.Error] We cannot convert the value null to type Record.

[GepettoRTHM]

Im getting an error I can't figure out, can you help me?
Ive made sure the ID's and PAT are all correct

---------- Message ----------
[Expression.Error] We cannot convert the value null to type Record.

---------- Session ID ----------
f8d0e823-c89f-4a0c-9444-6c014f15c52f

---------- Mashup script ----------
section Section1;
shared Query = let
// Pagination Logic: This part handles pagination by making API calls to Airtable with different offsets to retrieve paginated data.
Pagination = List.Skip(
List.Generate(
() => [Page_Key = "init", Counter=0], // Initialize page key and counter
each [Page_Key] <> null, // Continue generating while Page_Key is not null
each [
Page_Key = try if [Counter] < 1 then "" else [WebCall][Value][offset] otherwise null, // Determine the next Page_Key
WebCall = try if [Counter] < 1 then
// Initial API call without offset
Json.Document(
Web.Contents(
"https://api.airtable.com",
[
RelativePath = "v0/" & BASE_ID & "/" & TABLE_ID & "?view=" & VIEW_ID,
Headers = [Authorization = "Bearer " & PERSONAL_ACCESS_TOKEN]
]
)
)
else
// Subsequent API calls with offset
Json.Document(
Web.Contents(
"https://api.airtable.com",
[
RelativePath = "v0/" & BASE_ID & "/" & TABLE_ID & "?view=" & VIEW_ID & "&offset=" & [WebCall][Value][offset],
Headers = [Authorization = "Bearer " & PERSONAL_ACCESS_TOKEN]
]
)
),
Counter = [Counter] + 1 // Increment the counter for each iteration
],
each [WebCall]
),
1
),

// Convert the paginated data into a table
#"Converted to Table" = Table.FromList(
    Pagination, Splitter.SplitByNothing(), null, null, ExtraValues.Error
),

// Expand and structure the paginated data
#"Expanded Column1" = Table.ExpandRecordColumn(
    #"Converted to Table", "Column1", {"Value"}, {"Column1.Value"}
),
#"Expanded Column1.Value" = Table.ExpandRecordColumn(
    #"Expanded Column1", "Column1.Value", {"records"}, {"Column1.Value.records"}
),
#"Expanded Column1.Value.records" = Table.ExpandListColumn(
    #"Expanded Column1.Value", "Column1.Value.records"
),
#"Expanded Column1.Value.records1" = Table.ExpandRecordColumn(
    #"Expanded Column1.Value.records", "Column1.Value.records",
    {"id", "fields", "createdTime"},
    {"Column1.Value.records.id", "Column1.Value.records.fields", "Column1.Value.records.createdTime"}
),

// Rename columns to align with a specific naming convention.
#"Renamed Columns" = Table.RenameColumns(
    #"Expanded Column1.Value.records1",
    {
        {"Column1.Value.records.id", "_airtableRecordId"},
        {"Column1.Value.records.createdTime", "_airtableRecordCreatedAt"},
        {"Column1.Value.records.fields", "_airtableRecordFields"}
    }
),

// Reorder columns to the desired order.
#"Reordered Columns" = Table.ReorderColumns(
    #"Renamed Columns",
    {"_airtableRecordId", "_airtableRecordCreatedAt", "_airtableRecordFields"}
),

// Expand the record fields dynamically based on distinct field names, ensuring that all fields are expanded regardless of schema changes.
#"Expanded Record Fields" = Table.ExpandRecordColumn(
    #"Reordered Columns", "_airtableRecordFields",
    List.Distinct(List.Combine(List.Transform(
        List.Transform(Table.ToRecords(#"Reordered Columns"), each Record.Field(_, "_airtableRecordFields")),
        each Record.FieldNames(_)
    ))),
    List.Distinct(List.Combine(List.Transform(
        List.Transform(Table.ToRecords(#"Reordered Columns"), each Record.Field(_, "_airtableRecordFields")),
        each Record.FieldNames(_)
    )))
)

in
#"Expanded Record Fields";
shared PERSONAL_ACCESS_TOKEN = "xxxxxxxxxx" meta [IsParameterQuery = true, IsParameterQueryRequired = true, Type = "Text"];
shared BASE_ID = "xxxxxxxxxxx" meta [IsParameterQuery = true, IsParameterQueryRequired = true, Type = "Text"];
shared TABLE_ID = "xxxxxxxxxx" meta [IsParameterQuery = true, IsParameterQueryRequired = true, Type = "Text"];
shared VIEW_ID = "xxxxxxx" meta [IsParameterQuery = true, IsParameterQueryRequired = true, Type = "Text"];