That exception doesn't ring a bell, but 3.9 is now really old (released in 2011), so I'd recommend you try with a more recent version (4.9 at the time of this writing). If you still have that problem with the latest release feel free to post another question about it, and it will be easier to investigate and resolve.
That exception doesn't ring a bell, but 3.9 is now really old (released in 2011), so I'd recommend you try with a more recent version (4.9 at the time of this writing). If you still have that problem with the latest release feel free to post another question about it, and it will be easier to investigate and resolve.