Joulescope UI does not connect to JS220

Hi @yokoyama and welcome to the Joulescope forum!

It definitely sounds like you have the same issue with libwdi incorrectly claiming the Joulescope JS220. Did you try the solution at the bottom of that forum topic? Open PowerShell, and then copy this in:

Start-Process powershell -ArgumentList {
  foreach ($dev in Get-PnpDevice -Class 'USBDevice' -FriendlyName '*Joulescope*') {
    pnputil /remove-device $dev.InstanceId
  }
  pnputil /scan-devices
} -Verb runAs

Does this fix the problem?