This was broken in vscode v1.90, see https://github.com/microsoft/vscode/issues/214671 where I pointed out the new setting:
// Controls if the empty editor text hint should be visible in the editor. "workbench.editor.empty.hint": "text",
Workbench > Editor > Empty: Hint
also see https://github.com/microsoft/vscode/issues/214679
But it has been fixed and is working in the latest Insiders Build and should be out in v1.91 in early July 2023.
There is a setting that enables/disables that message:
Workbench > Editor > Empty: Hint
By selecting "Don't show again" you disabled that setting (setting it to hidden
).
To get the message back, reenable it - set it to text
.