Relative file path in Power BI

Hi I have tried this solutions and it works as intended. https://stackoverflow.com/questions/52878319/load-data-into-power-bi-from-relative-path

I have tried to make it a bit more automatic and failed. This is the code i have tried:

let
    Users = Folder.Contents("C:/Users"),
    CurrentUser = Table.FirstN(Table.Sort(Users,{{"Date accessed", Order.Descending}}),1)[Name]{0},
    FilePath = "C:\Users\" & CurrentUser & "\Folder\Folder\",
    Source = Csv.Document(File.Contents(FilePath & "Data.csv"),[Delimiter=";", Columns=265, Encoding=1252, QuoteStyle=QuoteStyle.Csv])
in
    Source

Everting loads and works perfectly in power query. But when I press close and apply i get this error message:

"Failed to save modifications to the server. Error returned: 'Expression in partition 'n/a' in table 'n/a' references an unknown entity.'."

Does anyone have any ideas?