Windows arm activation key

As I know, windows arm does not need a license right? Upon downloading and using windows 10, hours later I wasn't able to use windows 10 because it says that I needed to activate it. I signed up for the windows insider program and downloaded from there. Any help will be appreciated

 

The latest build which should be 21354. I am able to use it for awhile before the windows bugs me to activate it and for some reasons there will be no internet connection available. This happened a few times and I have not used it ever since because I am unable to do anything without internet connection