How to Fix Android Export Signing Errors in Construct 3

Android updates must be signed with the same key as the original install — which turns keystore management into a release-critical process. Here is the setup that avoids every common failure.

How to fix it

1. Create the keystore once, properly

Use Construct's keystore creation (or keytool), record the store password, key alias, and key password in your password manager — three separate strings people routinely confuse.

2. Use Play App Signing

Let Google hold the app signing key and sign uploads with your upload key — a lost upload key is then recoverable through support instead of orphaning your app.

3. Match the build type to the destination

Play uploads need a signed release AAB; debug APKs are for device testing only — 'signed in debug mode' rejections mean the export type, not the key, was wrong.

4. Back up beyond one machine

The keystore file plus credentials belong in at least two secure locations — the number of shipped games orphaned by a reformatted laptop is not small.

Catching the ones you can't reproduce

The hardest version of this to fix is the one you can't reproduce — it only happens on a player's hardware, OS, driver, or save state, under conditions that simply aren't present on your machine. A report that says “it crashed” or “it froze” gives you nothing to act on, so the bug survives release after release while quietly costing you players.

Automatic error capture closes that gap. Each failure arrives with its full stack trace, the device and OS, the build number, and a breadcrumb trail of what the player did right before it broke, so even a failure you have never seen becomes a specific, reproducible issue. Fold identical failures into one signature ranked by how many players each hits, and your worklist sorts itself worst-first instead of arriving as a stream of vague complaints.

This is where a tool like Bugnet earns its place. Its SDK captures every Construct 3 error automatically with the full stack trace plus device, OS, memory, build, and game-state context, folds duplicates into one grouped issue with an occurrence count, and ties each to the build it first appeared on — so you fix the problem that hurts the most players first and confirm it is gone when its signature disappears from the next release.