The Respondus Lockdown browser uses the google chrome web browser. Due to this, users may run into an error regarding the "Screencastify" google chrome extension.
To remove this extension from chrome, you'll need to delete the extension from all of the profiles that you have signed into Chrome.
To do this, follow the steps below:
1. Open Google Chrome and click on the extensions button in the top right.
2. Click the three dots next to the screencastify extension and click "remove from chrome"
3. If this does not resolve the issue, you will need to repeat this process with the remaining chrome profiles. These profiles are accessed by clicking on the profile picture in the top right and selecting the profiles from the list.