Can't get my nodes in ACTIVE MODE

I acquired a Dragino Pico Gateway (LG308) which is successfully connected and remains ACTIVE.
I also acquired some Dragino humidity and temperature nodes (LSN50-v2-s31), but can not get them “Active”.

However, I can either see some join request in my gateway frames, as can see below:

Any idea of what could be wrong? I have farely checked my App and Network session keys for authentication, and all seem to be ok.

Have you checked the events tab of the device in the web-interface? You will find errors there.

I cannot see “events” tab in my web interface. Where is it? Thank you very much in advance @brocaar

Sorry I mean device data tab.

I cannot see device data tab because it is still not propperly connected. @brocaar