Can't install unsigned APK

[OutIaw]

What happened?

Attempting to install version v15.2 on ColorOS 16. The system package installer returns an "Invalid or corrupt APK" error immediately upon opening the file.

Steps to reproduce

1. Download .apk from the v15.2 release page.
2. Open the file via the system file manager.
3. Attempt to install.
4. Observe error: "Invalid or corrupt APK".

Expected behaviour

App should install and open.

WHOOP device

WHOOP 5.0

WHOOP firmware

50.35.2.0

iOS version

Colour OS 16

iPhone model

Oppo Find N5

Goose build

cddb91e

Diagnostic log

[OutIaw]

Hi @tigercraft4 is this project still active