Elevio (elev.io) provides an embeddable help system for sites, much like Intercom, Zendesk etc.
This embeddable seems to be getting blocked.
An example can be seen by visiting its own homepage https://elev.io
where the embeddable script is installed
Another example would be https://releasenotes.io
There should be a blue badge with a question mark in it on the bottom right corner of the screen.