It looks like the extension has a broken script hash. I'm not really up on extension development, so I hope this helps debug things:
Failed to find a valid digest in the 'integrity' attribute for resource 'chrome-extension://bmdblncegkenkacieihfhpjfppoconhi/panes-3-4-0/assets/ember-inspector.js' with computed SHA-256 integrity 'vRfOB+zwlqbAVgwg0e4YZW4qqbG899tr1UGDjEef21k='. The resource has been blocked.
macOS 10.14.6
Chrome 78.0.3904.97
Ember Inspector 3.12.0
We are aware, but do not know how to fix it yet.
Can you roll back to the latest stable version?