Can you not open the sidebar on your kiosk tablet? If not you may have hidden it with browser mod already.
Make sure you are logged into a HASS dashboard as an admin. Go to the front end settings and make sure the sidebar hidden setting is false for your kiosk tablet. Click the edit pencil to change if necessary.
If not, DELETE the browser mod registration for the kiosk table from the admin dashboard browser mod, refresh the kiosk tablet. You should be able to open the sidebar to access browser mod.
