'Checking xpath with $x('//div') not working at https://chrome.google.com/webstore/

I want to use Selenium to open at extension https://chrome.google.com/webstore/detail/urban-free-vpn-proxy-unbl/eppiocemhmnlbhjplcgkofciiegomcon and check if it is installed or not. But for some reason, I even can't check XPath in console, when I try to execute $x('//div') I get an error

m=consumer:103 Uncaught TypeError: Cannot read properties of undefined (reading 'call')
    at Ug (m=consumer:103:356)
    at $x (m=consumer:612:137)
    at <anonymous>:1:1

The same is in Chrome and Firefox.



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