@JasonNYC
Hi Jason,
Looks like the problem with sideloading apk files is not just apkpure.com specific. I've just tried to install Onkyo HF Player apk file taken from another apk website which is considered safe and legitimate - apkmirror.com. I use xapk installer installed on Kann Cube, because otherwise the player doesn't see the apk files that I put in the Open Service folder. Anyway, I go to Service menu item > open xapk installer > see the Onkyo HF Player apk > tap on Install > tap on Next > tap Install again and get a message : "Parse Error. There was a problem parsing the package".
Tried this with Onkyo HF Player apk files from both apkpure and apkmirror resources. Get exactly the same error message. And I'm not based in the North America region, so shouldn't be about the region restrictions, either.
Have the latest firmware update on my Kann Cube. I have even checked the MD5, SHA1 and SHA256 hashes for both apks - looks perfect. So yes, please ping the team and have them take a closer look at the problem.