Calc : WEBSERVICE",Array( PBM

Hi,
I have PBM with functionAccess.callFunction(“WEBSERVICE”,Array( cell )
Could you tell how to pass a STRING to the WEBSERIVE fonction ?
I works if I put the value directly between " , but dos not work with the same value from a cell of my sheet.
LO returns

Erreur d’exécution BASIC.
‘>1’
Une exception s’est produite :
Type: com.sun.star.lang.IllegalArgumentException
l
Thanks

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