Checklists for software errors, setup, and tool workflows.

Fix Docker Build Error: 'failed to solve: manifest not found'

You run docker build and get an error like:

failed to solve: error fetching ...

Fix Microsoft Teams Token Expired by Clearing Cache

If you see a 'token expired' or 'sign-in error' message in Microsoft Teams, it often means the st...

OpenVPN Connection Failed: Check Firewall Settings

You see "connection failed" in your OpenVPN client log. The server is reachable, but the handshak...

How to Fix Windows Security Error 0x80070422

You open Windows Security and get error 0x80070422, or see a message that the app can't start. Th...

How to Fix Gradle Build Failed Error

When a Gradle build fails, you typically see a red message in the console with an error stack tra...

Fix Microsoft Store Error 0x80073cf3: Service Unavailable

When you see error code 0x80073cf3 in the Microsoft Store, it usually means the Store can't reach...