Check recovery access before reinstalling COME
Reinstallation can remove local information and require sign-in again. Check account recovery before treating it as a troubleshooting step.
Identify the actual problem
A network interruption, forgotten password and failed installer are different problems. Reinstalling may not solve the first two. Write down the symptom and read the related help topic before deciding to remove an app.

Confirm a recovery route
The Forgot Password help directs readers to recovery from the login page. Verify that you control the relevant recovery method and can follow the current instructions. Do not rely on a password stored only inside a session you may lose.
Keep a useful technical note
Note the current version and error text. Avoid copying passwords, OTPs or full account details into public messages. If you cannot establish recovery access, preserve the working session and seek help through the displayed service route.
A useful next step
Use the least disruptive fix that matches the problem; reinstall only when the reason and recovery path are clear.
Related: Removing an old COME APK after an update