Problem: Cannot administer League Manager. The issue is a bug in McAfee's WebAdvisor extension for Chrome. 


Solution: Turn off WebAdvisor extension in Chrome.


This issue has been resolved by McAfee as of 1/17/2024.



How to turn off McAfee WebAdvisor extension in Chrome browser


  1. Open your Chrome browser.
  2. Click on the 3-dot menu at the top right of your browser window just below the "X".



  3. Hover over "Extensions" (see blue arrow below) and select "Manage Extensions".



  4. Find the McAfee WebAdvisor extention shown below.



  5. Click on the slider button (blue arrow).



  6. The slider button will be grayed out indicating you have disabled the WebAdvisor extension.



  7. Close the Chrome browser.
  8. Open the Chrome browser.
  9. Everything should work in League Manager now.