If you're trying to report feedback via Marker.io on your mobile website but can't see the widget, it's probably because your browsers is blocking cross-site cookies. Marker.io needs to know who you are on your website but by default, browsers blocks cross-sites cookies.
First, change the setting for your browser:
Once it's done, head over https://app.marker.io to login and then go to your website.
If you still don't see the widget, please contact us.