If you are trying to use LockDown Browser for Chromebook with your Schoology exam, you'll first need to allow pop-ups for your Schoology environment in the Chrome Browser.

To do this, in the Chrome browser, go to "Settings" >   "Privacy and Security" > "Site Settings" > "Pop ups and redirects"





Move the toggle switch to the right to allow pop ups.



Alternatively, you can click the "add" button under the "Allow" header, and add your Schoology URL to the list of sites. The below specification is just an example. Your Schoology URL will be different.