You must use the latest version of the recommended browser and a current version of MacOS or Windows (not an electronic tablet or phone). You can check that your system meets the requirements (be sure to use the recommended browser, latest version of Mozilla Firefox, to access the system check link).
Please try again using the recommended browser.
If the problem persists after downloading the recommended browser and attempting to access the test using the recommended browser, please select “Yes” above (please do not click submit until clicking “Yes” and submitting the additional questions)
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Since the problem is happening even when using the recommended browser to access the test, please complete the following support form so we can help troubleshoot the issue.