Probably unrelated to the Join problems, but your DevEUI DDDDDDDD... does not seem to be a proper EUI. From the specifications, emphasis mine:
6.2.1 End-device identifier (DevEUI)
The DevEUI is a global end-device ID in IEEE EUI64 address space that uniquely identifies the end-device.
If your device does not provide a proper EUI then better let TTN Console generate one for you.
That said, the screenshot of your gateway shows that TTN sent a Join Accept to the gateway, so somehow either the gateway was not transmitting that, or the node did not receive it. Make sure there are at least a few meters between node and gateway. And for LMiC, search this forum for MAX_CLOCK_ERROR.
(Also, I guess you know you should not send text.)