usebruno/bruno · error · Error

Selected collection is not available.

Error message

Selected collection is not available.

What it means

Error "Selected collection is not available." thrown in usebruno/bruno.

Source

Thrown at packages/bruno-app/src/utils/mock-server/mock-server-instances.js:345

  if (instance.sourceType === 'spec') {
    const spec = resolveInstanceSpec(instance, apiSpecs);
    if (!spec?.pathname) {
      throw new Error('Selected API spec is not available. Open it in the workspace first.');
    }

    return {
      mockServerUid,
      serverName: instance.name,
      sourceType: 'spec',
      specPath: spec.pathname,
      workspacePath: resolvedWorkspacePath,
      port: Number(instance.port),
      globalDelay: Number(instance.globalDelay) || 0
    };
  }

  if (!collection?.pathname) {
    throw new Error('Selected collection is not available.');
  }

  return {
    mockServerUid,
    serverName: instance.name,
    sourceType: 'collection',
    collectionPath: collection.pathname,
    collectionName: collection.name,
    brunoConfig: collection.brunoConfig,
    workspacePath: resolvedWorkspacePath,
    port: Number(instance.port),
    globalDelay: Number(instance.globalDelay) || 0
  };
};

export const openMockServerDashboard = (instance, collectionUid) => (dispatch) => {
  dispatch(addTab({
    uid: instance.uid,

View on GitHub (pinned to 9bdd81c7bd)

Solutions

1. Reload the workspace so the collection is available, then retry.
2. Confirm the collection was not removed from the workspace.

When it happens

Trigger: Thrown at packages/bruno-app/src/utils/mock-server/mock-server-instances.js:345 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of usebruno/bruno@9bdd81c7bd (2026-08-13). Data as JSON: /api/errors/dea5ea6df88d56f1. Report an issue: GitHub.