The issue is that you don’t have the vscode support package installed into your profile. You need one for each profile you are going to use. We have a number of extra tools that the IDE uses that aren’t part of the Legato Application Framework (yet, they will be there in the future).
What you need to do is add a filter above for “vscode” and have both master and vscode filter selected (unselect any others). You should see 2 packages, the one labeled 190424 is the newest and should be used.
Click on the swi-vscode-support-190424 package and click on Add to profile…
That should add the tools that you need to your profile and get ride of the error that you are seeing.