Error loading extension "AI Assistant"

I installed the AI assistant (and the lua extensions it required) but there is an error displayed at the top right
The following message is displayed when my cursor hovers the error icon : cannot prepare extension setup. No hook with the name ".editors.text.editorCreated" found

The AI assistant plugin is not available / usable

What I did to install:

• Go to Extension Mode
• Check "Use external repository"
• Click on "AI Assistant" and click on "Install"

I already tried to close and re-open QtCreator, deactivate/reactivate, uninstall/reinstall but still the same error.