Addition of new org. users is not working


I’m new to this LoRa Server entire framework. I’m trying to setup LoRa server and LoRa App server. Although LoRa Server & LoRa App server is working, I’m not able not add new org. users through LoRa App server web based User Interface. whenever I try to do this operation it leads to a blank page.
i’ve to return back and refresh it to load the previous page. I tried many times but same problem.

Please help.!!
thanks in advance.

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