I have the same problem with my LG G6... I've been trying to download the app from the Play store too and I always get the same message. I don't know about a LG App store, never heard of it..
Title edited by mod
Welcome to the community. I moved your reply to a new thread as I can see you've got a different device.
As of now, Premiere Rush does not support LG G6. Here is an article that lists the Rush supported device
Also, you can request to add your device: https://adobepremiererush.typeform.com/to/oewfEF
Rush is only available on selected Andoid devices. The ones that Adobe can test and verify that the app runs without issues. It's understandable because Android is so fragmented and Adobe can't test each and every device.
Is there a way to ask for permission to install premiere rush on a LG G8s?
Please add LG G8...5G phone with no Adobe Apps...???