Trying to view device info tab on Kolibri dashboard

{
  "request": {
    "path": "/api/device/deviceinfo/",
    "params": {
      "1556024023539": 1556024023539
    },
    "headers": {
      "Content-Type": "application/json",
      "Accept": "application/json, application/json;q=0.8, text/plain;q=0.5, */*;q=0.2",
      "X-CSRFToken": "nNT7YX6jlzXZ8drYVWg4qxPqSEMEvBo5ee23LxW4ZrxnQ7C22qk5uxebF4KyQB0O"
    },
    "method": "GET",
    "canceled": false
  },
  "url": "/api/device/deviceinfo/?1556024023539=1556024023539",
  "raw": {},
  "status": {
    "code": 500,
    "text": "Internal Server Error"
  },
  "headers": {
    "Date": "Tue, 23 Apr 2019 12:53:44 GMT",
    "Vary": "Accept-Language, Cookie",
    "Server": "0.0.0.0",
    "Content-Length": "27",
    "X-Frame-Options": "SAMEORIGIN",
    "Content-Language": "en",
    "Content-Type": "text/html"
  },
  "entity": "<h1>Server Error (500)</h1>"
}

Kolibri version 0.12.2
Rasberry pi 3

Thanks for the report. this error appears to be coming from outside of Kolibri.

Could you please explain a bit more about your setup? E.g. do you have nginx configured? Did you install with the debian package? Was this working previously?