Elsa 3.x: Dragging a JavaScript activity onto the grid generates console errors

## Description
When dragging the JavaScript activity onto the workflow designer canvas, errors appear in the browser console.

## Steps to Reproduce

1. Create a new workflow
2. Drag the JavaScript activity onto the canvas
3. Observe the console
4. A second error may appear occasionally

## Expected Behavior:

No errors should be thrown when adding the JavaScript activity.

## Screenshots

## Environment

- Elsa Studio version: 3.4
- Client version: 3.4.0.0
- Server version: 3.4.0-preview.2782
- Tested on toolbox test

## Additional Context

- Confirmed this issue occurs in version 3.2 as well.
- Error 1:
Uncaught (in promise) Error: System.ArgumentException: There is no tracked object with id '33'.
- Error 2:
Refused to create a worker from 'blob:...' due to CSP restrictions.