I’ve been using the WLR089U0 xplpained board and can offer some advice.
Try using the Range Test example. I’ve had a lot of issues trying to use the Mote example, (AU915), but none with the Range test. I would also recommend using the CLI to disable the devNonce check. Particularly when you are developing your code.
Take a look here: Request - DevMode toggle or Reset Nonce button - #18 by zygurt for how I did it.