Navigate to Settings>update
There are two main options for updating the system:
Upload a .zip file that contains the new version update files.
Click on "Upload Zip File" (or drag and drop).
Wait for the file to upload completely.
Click the "Update Now" button (bottom right) to start the update.

2.Click & Update
Switch to the Click & Update tab

If update version is available, click View Changelog button to see details of the update

Click Download & Install button to start the automatic update process.

Upon completion, a success message is displayed: "Update installed successfully"

After confirming that the new version is visible, clear the cache on your server.
Next, create a new Node-based WhatsApp application and restart all the running cron jobs.
Then go to:
http://yourdomain/admin/system/setting/automation
or
https://yourdomain/admin/system/setting/automation
On this page, you will find the full Automation Setup Documentation.
It explains how to configure:
All types of message campaigns
Automatic contact importing
Complete automation settings for the system
Follow the instructions there to ensure your message campaigns run smoothly.

Before starting an update : Ensure you have backed up all server files and databases. Avoid closing the browser tab during the update process. Confirm a stable internet connection.