Uncaught TypeError: can't access property "el", n is undefined

Problem "solved" removing :

const panelManager = editor.Panels;
**panelManager.getButton('views', 'open-blocks').set('active', true);**

looking for a better solution to make active the block panel af first

I've also noticed other conflict like with my custom modals and modal from export plugin (clicking export plugin was fire my custom modal on FFox), or for example panel that i've remode appeared again i've solved putting everything in my code inside

window.onload = function(){
    //my code here
}

Thanks for reporting this, @devtechk.

The issue with Uncaught TypeError: can't access property "el", n is undefined appears to be a race condition or state management timing problem. This typically happens when component lifecycle events and DOM modifications overlap, creating an inconsistent state.

What to try:

1. Add a setTimeout wrapper to ensure the DOM has settled:

setTimeout(() => {
  // your operation here
}, 0);

2. Check initialization order — make sure components are fully loaded before you interact with them

3. Use the editor's event system — listen to completion events:

editor.on('component:mount', (component) => {
  // safe to interact with component here
});

Recommended next steps:

• Test with the latest GrapesJS version if you haven't
• Provide a minimal reproducible example (CodeSandbox) — this helps the team identify the root cause faster
• Include GrapesJS version, browser, and console errors in your report