Try re-downloading it if you have issue with Amber login

https://github.com/0xchat-app/0xchat-app-main/releases/download/v1.2.7-beta2/v1.2.7-beta.2.apk nostr:note19eedqhar657pv0nxgj7dh8dgqk9ufygzxm3g8m52d8w59p2z88zqac62ue