VSCode does not find virtual environment anymore

Lately, VSCode has been unable to find the virtual environment present in my project folder.

Suprisingly, the PYTHONPATH is set correcty:

"python.pythonPath": "$(workspaceFolder)/venv/bin/python"

and the venvPath is also set to point to it:

"python.venvPath": "$(workspaceFolder)/venv"

What did I miss to get VSCode to propose my virtual environment as python interpreter?