Issues invoking custom function from another

Hello,

I'm having trouble finding what's wrong when invoking a custom function from another.

Consider:

/* getTimeEntryPage(updateFrom, page) */
(updateFrom as text, page as text) =>
let
    ...
in
    ...

This works as expected whan manually invoked with, for example: getTimeEntryPage("2021-03-24", "1").

Now, I also have this:

/* getTimeEntriesFromDate(updateFrom) */
(updateFrom as text) =>
let
    Source = Json.Document(Web.Contents(/*This query works*/)),
    List = {1..Source[total_pages]},
    #"Converted to Table" = Table.FromList(List, Splitter.SplitByNothing(), null, null, ExtraValues.Error),
    #"Changed Type" = Table.TransformColumnTypes(#"Converted to Table",{{"Column1", type text}}),
    #"Renamed Columns" = Table.RenameColumns(#"Changed Type",{{"Column1", "page"}}),
    #"Invoked Custom Function" = Table.AddColumn(#"Renamed Columns", "getTimeEntryPage", each getTimeEntryPage(updateFrom, [page])),
    ...
in
    ...

When I call getTimeEntriesFromDate("2021-03-24") manually, I get the following error:

"Unexpected error: Operation is not valid due to the current state of the object."

In the #"Invoked Custom Function" line, the following will work (although will only return a subset of data):

getTimeEntryPage(updateFrom, "1")

In the same line, the following will return the same error as above (expected as 1 is a number, not the expected text type):

getTimeEntryPage(updateFrom, 1)

Since [page] is set to text type, I don't understand why this is not working. Does anyone have an idea?

Note: I've made sure the origin data is clean.

Thanks!