I finally got around to upgrading Launchbox on my Android phone to test this. Everything worked fine from the share on my Windows server. I then looked at the Changelog for the new Android build, the forums threads and inside the LB app on the phone itself and I don't see any mention of which version of the SMB protocol is supported or required. What I recommend is checking on your TrueNAS server and see what version of SMB it is currently using. If version 1, try setting it to version 2 and try from your Android device again. If you are currently running versions 2, try changing to version 1. Good luck!