Error encountered while calling an API

Hello, I have a problem with a call and I would need some help.

When I call an API with the SendFormDataArray method of the EnsLib.HTTP.OutboundAdapter adapter, I pass it a %Net.HttpRequest object and I receive the following error:

ERROR #5002: ObjectScript error: <SUBSCRIPT>MatchSuffix+1^%Net.HttpRequest.1 ^%qPublicSuffix("")

I have correctly entered the url in my business operation and I pass it in the last parameter of the SendFormDataArray method. Do you have any idea, please?

Method XRPUAuthentification(pInput As ANCV.msg.BO.XRPUAuthentificationDmde, Output pOutput As ANCV.msg.BO.XRPUAuthentificationRpse) As %String
{
	
 Set pOutput = ##class(ANCV.msg.BO.XRPUAuthentificationRpse).%New()
 
 Try{
 	Set httpRequest = ##class(%Net.HttpRequest).%New()
 	Set utilisateur = ##class(ANCV.WebObjet.wsXRPUUtilisateur).%New()
	Set utilisateur.login = ..RecupererLogin()
	Set utilisateur.password = ..RecupererMdp()
	Do httpRequest.SetHeader("Content-Type", "application/json")

 	//Transformation du message d'entrée en JSON
 	Set tSC = ..ObjectToJSONStream(utilisateur, .entityBody)
 	$$$ThrowDecomposeIfError(tSC, "Impossible de transformer le message", $$$ErreurRecuperationToken)
 	
 	Set httpRequest.EntityBody = entityBody
 	//Appel à l'api security/authentication
 	set tSC = ..Adapter.SendFormDataArray(.response, "POST",httpRequest,,,..Adapter.URL_"/security/authentication")
 	$$$ThrowDecomposeIfError(tSC, "Impossible d'appeler l'api", $$$ErreurRecuperationToken)
 	//Transformation du JSON de retour en message
 	set tSC = ..JSONStreamToObject(response.Data, .pOutput, "ANCV.msg.BO.XRPUAuthentificationRpse", 1)
 	$$$ThrowDecomposeIfError(tSC, "Impossible de récupérer le token", $$$ErreurRecuperationToken)
 	set pOutput.codeRetour = "OK"
 } Catch Exception {
		Set pOutput.codeRetour = "KO"
		Set pOutput.libErreur = Exception.DisplayString()
		Set pOutput.codeErreur = Exception.Code
	 }
	 Quit $$$OK
}

Method RecupererLogin() As %String
{
	Quit ##class(Ens.Config.Credentials).GetValue(..Adapter.Credentials, "Username")
}

Method RecupererMdp() As %String
{
	Quit ##class(Ens.Config.Credentials).GetValue(..Adapter.Credentials, "Password")
}