Need assist on Error 520

  • Hi, i am unable to login, it give a error message says "you have attempted to connect to an invalid server. If this problem persists, please contact customer support. (Error 520)"
    Normally i login by 3G mobile broadband to check AH, but today i upgrade the plan to 4G and when i try to login, this error message pop out.
    Using a MacBook Pro, 10.7.4
  • You can try deleting the Battle.net cache folder and see if that helps.

    Clearing your Battle.net Cache
      1. Navigate to Mac HD/Users/Shared/Blizzard/
      2. Move the Battle.net folder to the trash.
      3. Empty the Trash.
      4. Launch Diablo III