overwolf.notifications.onToastNotification event is wrongly named on docs and type file.
used as onToastInteraction at runtime (and works), so both docs and d.ts file are wrong on this one.
you can just pop into a running app console and type overwolf.notifications and see the members list…
picture attached to save your time
also using toast on an unpacked app does NOT work.
returned error is: “Required app start menu shortcut is missing!”
found a thread on Slack where “Gildon” told another user that installing the app once as an OPK should solve this - did NOT work for me, even after you test it on an OPK, reverting to the unpacked version breaks it again.