@ryanscripts even if its deprecated you can still use it, but keep in mind that it changes only header, not internal user-agent like in navigator and etc
I have the same problem, how to fix it?
Version of BAS: v28.1.2
Extension: akdgnmcogleenhbclghghlkkdndkjdjc
Logs:
Thread #1 : Thread ended with message "Timeout during ClickExtensionButton"
Enable manual browser control and check if the extension is installed !