The button was visible. The selector found it. The click did nothing. An invisible modal overlay was stealing every interaction.

What Happened

Playwright automation for NotebookLM upload failed with “Add source button not clickable”. Screenshots showed the button was visible but clicks didn’t register.

Investigation

Screenshot analysis revealed: Google’s UI had an invisible modal overlay (search dialog, promo, or consent dialog) capturing all clicks before they reached the target button.

Key symptom: Element is visible, selector finds it, but click() fails silently or times out.

Resolution

Created dismissOverlays() function to clear modals before interacting:

async function dismissOverlays(page: Page) {
  // Press Escape multiple times to dismiss any open dialogs
  for (let i = 0; i < 3; i++) {
    await page.keyboard.press("Escape");
    await page.waitForTimeout(200);
  }
  
  // Click outside any modal areas
  try {
    await page.click("body", { position: { x: 0, y: 0 }, force: true });
  } catch {
    // Ignore if click fails
  }
}

// Usage before any critical interaction
await dismissOverlays(page);
await page.click('button[aria-label="Add source"]');

Lesson

Google products love modals. When automating Google UIs (Docs, Drive, NotebookLM, etc.), always:

1. Take debug screenshots before failing
2. Assume invisible overlays exist
3. Add dismissOverlays() as standard practice
4. Use force: true as last resort (bypasses actionability checks)

Prevention Pattern

// Before any critical Google UI interaction:
await dismissOverlays(page);
await page.waitForTimeout(500); // Let animations settle
await page.click(selector, { timeout: 10000 });