・We cannot support operation in a CUI environment even if you contact us.

・If you develop using anything other than Visual Studio Code in a GUI environment, we cannot support it, so we recommend using Visual Studio Code.

・When starting an ubuntu 18.04-based container with Visual Studio Code 1.88 or later versions, an "Connect to an OS version not supported by Visual Studio Code?" message is displayed. Please press the allow button.

Be sure to copy the SDK zip file into Ubuntu before extracting the zip file. If you extract it on another OS such as Windows and then move it to Ubuntu, it will not work properly.
However, in a Docker Desktop environment, unzip the zip file on a Windows OS.