Here is an explanation:
Google decided that Chrome would no longer allow certain JavaScript functionality. Articulate and other SCORM authoring software relied on that JavaScript functionality, and this has broken the connection between Articulate and the LMS when learners who use Chrome do certain things.

Are there any workarounds? 
This is going to be a painful issue for SCORM until the industry, including Articulate, makes the necessary changes, and there are no very good workarounds. Here are some possibilities:
 
  • You can ask your users to try another browser such as Firefox.
  • You can have your learners take the following steps in Chrome: 

            1. Open Chrome browser

            2. Go to chrome://flags/#allow-sync-xhr-in-page-dismissal
            3. Change the drop-down selection from "Default" or "Disabled" to "Enabled"

  • You could restructure SCORM courses into shorter packages (microlearning), decreasing the chance that a learner navigates away in the middle of a package.
  • You could restructure your course workflow to help with unlocking of activities.