There is a compilation error in unit WEBLib.TMSWEBGraphics.General, Line 2554: The code should be fixed to:
procedure TTMSWEBGraphicsContextGeneral.SetFontName(AName: string);
begin
{$IFDEF FMXLIB}
Canvas.Font.Family := AName;
{$ENDIF}
{$IFNDEF FMXLIB}
Canvas.Font.Name := AName;
{$ENDIF}
end;