In this [issue](https://github.com/facebook/react/issues/23373), when you navigate to [this app](https://next-rsc-notes.vercel.app/note/1646289027680) and inspect the sidebar in the components tab, you will get this error:

![image](https://user-images.githubusercontent.com/2735514/158241727-64eba8f9-5ac2-4aa7-bffa-ff9b3174a261.png)

 This is a user error. One of the components in the user's app thrown. However, the UI for this is confusing, because it seems like it's a DevTools error. We've gotten a lot of bug reports like this, and it would be good to differentiate between DevTools bugs and bugs in the app. For this task:

- [ ] Build the React DevTools extension locally (instructions [here](https://github.com/facebook/react/tree/main/packages/react-devtools-extensions)) and reproduce the error
- [ ] Figure out a way to have the front end be able to differentiate whether the error is a error within DevTools or within the user's app
- [ ] Design/implement a better UI to help app developers distinguish between these two cases
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    });
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    pendingStringTableLength += encodedString.length + 1;
    return id;
  }
  function recordMount(fiber: Fiber, parentFiber: Fiber | null) {
    const isRoot = fiber.tag === HostRoot;
    const id = getOrGenerateFiberID(fiber);
    if (__DEBUG__) {
      debug('recordMount()', fiber, parentFiber);
    }
    const hasOwnerMetadata = fiber.hasOwnProperty('_debugOwner');
    const isProfilingSupported = fiber.hasOwnProperty('treeBaseDuration');
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    let profilingFlags = 0;
    if (isProfilingSupported) {
      profilingFlags = PROFILING_FLAG_BASIC_SUPPORT;
      if (typeof injectProfilingHooks === 'function') {
        profilingFlags |= PROFILING_FLAG_TIMELINE_SUPPORT;
      }
    }
    if (isRoot) {
      pushOperation(TREE_OPERATION_ADD);
      pushOperation(id);