Android Question Compile Error with HTTP

Hi,
When i compile an app using http library, i obtain an error (attached picture).
However this error appears under this configuration :
B4A V8.50, WIN 10, Javac 1.8.0_191

Under an old configuration i have no error and the app work fine :
B4A V5.20, WIN XP, Javac 1.6.0_20

I post after many re-installation of Java sdk, with no success.

I made this next small exemple to better see the problem.
I you could help me !
Thank you.

'*****
#Region Project Attributes
#ApplicationLabel: B4A Example
#VersionCode: 1
#VersionName:
'SupportedOrientations possible values: unspecified, landscape or portrait.
#SupportedOrientations: unspecified
#CanInstallToExternalStorage: False
#End Region

#Region Activity Attributes
#FullScreen: False
#IncludeTitle: True
#End Region

Sub Process_Globals
Dim hc As HttpClient 'Required to connect to the Internet
End Sub

Sub Globals
End Sub

Sub Activity_Create(FirstTime As Boolean)
hc.Initialize("hc") '***** COMPLIE ERROR ON THIS LINE ******
End Sub

Sub Activity_Resume
End Sub

Sub Activity_Pause (UserClosed As Boolean)
End Sub
'*****