Can't scan QR Code for Web WhatsApp.

After Updating my mobile to iOS 15.5 update, my WhatsApp web on other device (laptop) was automatically logged out. I cannot log back in as I cannot scan the QR Code from my laptop through WhatsApp app on my phone. I use iPhone 8+. I tried everything at same time I am able use other apps on my laptop by scanning QR Code:

• WhatsApp app had been updated before iOS update
• scan bar code from my phone with / without WIFI. (Used Cellular data also)
• remove WhatsApp & reinstall
• reset network on my iPhone

Nothing seemed to work. I need the solution ASAP

Thanks!