I can confirm the same issue outlined in this thread.
I just received the WxLink kit and had no data being transferred when it was all plugged in. Further investigation found the same 'no init' issue on both the TX and RX boards, rebuilding the software (github) with the library from seed studio corrected the behaviour.
After this I have the data being sent and received by the OurWeatherPlus board. Reception is a little dodgy with only ~50% of packets being decoded, but that could simply be a noise issue in my office while testing. I'll wait until the system is in place before looking further into that.