If the LockDown Browser Dashboard will open for some courses, but not others, it may be caused by one of the following:
* there is an unacceptable symbol in the course title.
* there is an unacceptable symbol in one of the quiz titles.
You need to check the title for the course, as well as all the titles of each quiz in that course. If you find these types of symbols, you must edit them out.
When checking for these, be sure to use multiple browsers. Firefox tends to display them more successfully than Chromium-based browsers.
Below is an example of an unacceptable symbol/image in a course title.
These are examples of a quiz title with unacceptable images.