The MICROFRONTENDS_MISSING_FALLBACK_ERROR error occurs when a microfrontends request did not match any other deployments in the same environment, and no deployment could be found for the specified fallback.
I'm encountering an error and reviewing the docs at /flg~eyJhbGciOiJIUzI1NiJ9._v7-_v79_Q.kEoXNQUHcA8QCIB_rAf5x6CjUKyoy4GW5y0g6anE81o/docs/errors/MICROFRONTENDS_MISSING_FALLBACK_ERROR to understand what's happening.
Please help me resolve this by:
1. **Suggest the fix**: Analyze my codebase context and propose what needs to be changed to resolve this error
2. **Explain the root cause**: Break down why this error occurred:
- What was the code actually doing vs. what it needed to do?
- What conditions triggered this specific error?
- What misconception or oversight led to this?
3. **Teach the concept**: Help me understand the underlying principle:
- Why does this error exist and what is it protecting me from?
- What's the correct mental model for this concept?
- How does this fit into the broader framework/language design?
4. **Show warning signs**: Help me recognize this pattern in the future:
- What should I look out for that might cause this again?
- Are there similar mistakes I might make in related scenarios?
- What code smells or patterns indicate this issue?
5. **Discuss alternatives**: Explain if there are different valid approaches and their trade-offs
My goal is to fix the immediate issue while building lasting understanding so I can avoid and resolve similar errors independently in the future.
To troubleshoot this error, follow these steps:
In the Production environment, this error should not occur since every request is routed to the Production environment of mcirofrontends projects. Make sure that every project in the microfrontends group has a production deployment.
In non-Production environments, the fallback is configured in the Fallback Environment setting. Based on the configured option, check that every project has a deployment for that environment.
If the issue persists after checking that every project has a deployment in the configured Fallback Environment setting, please contact Vercel support to reach out to the team.