Error exporting dataframe using writexl package

Hi, i found about a package who could export my data.frame to excel, but i encounter some difficulties.
(I'm new on this plateform and i'm sorry if something in my request is wrong, do not hesitate to get me noticed about it if it is the case!)

I am trying to export a dataframe called "div1" to an excel doc called "TEST.xlsx" using the function write_xlsx from the package writexl, but i got an error message and don't know how to resolve it:

There is my running of the console:

> write_xlsx(div1,"C:\\Users\\Utilisateur\\Desktop\\TEST.xlsx")
[ERROR] workbook_close(): Error creating 'C:\Users\Utilisateur\Desktop\TEST.xlsx'. System error = Permission denied
Erreur : Error in libxlsxwriter: 'Error creating output xlsx file. Usually a permissions error.'

PS: i do not know why but the topic creation transformed my double "" into a single one

I'm using the Rstudio Version 1.3.1093 in admin mode and using doc.xlsx with OpenDocument.

Thanks for your help,