I followed the mobile app directions for adding API_SECRET entry into the .env file in the Ninja root install (Took me a bit, had to turn on “show hidden files” in the cPanel file manager).
In the Android app settings, I enter the installation URL, my api secret, then get “Something went wrong. Undefined error occured.”. I tried adding/removing the “s” in http, as well as interchanging http://ninja.mydomain.com and http://mydomain.com/ninja but I either get “invalid URL” or the above undefined error. I triple checked my env file looks exactly as in the mobile apps docs, capitalization and everything.