The Channel 4 app, All 4 app, sometimes presents error code t002, and it could be due to one of the following reasons:
The All 4 app is experiencing a technical glitch or is down for maintenance.
Your browser cache has corrupted All 4 data.
You’re using an outdated All 4 app.
The All 4 app installation files are corrupted, meaning you need to reinstall the app.
You’re using an outdated browser to access Channel 4.
Your internet connection is experiencing signal strength problems.