Blocking third-party cookies is incompatible with Vocareum when your assignment or lab is embedded within another website. In most cases, you may be presented with a login page and error message, even if you are already logged in to the original site.
If you are using Chrome:
Go to the browser Preferences => Privacy and security => Cookies and other site data, then disable "Block third-party cookies".
Alternatively you can visit: chrome://settings/cookies
If you are using Safari:
Go to the browser Preferences => Privacy, then disable "Prevent cross-site tracking"
If you are using Brightspace, set LTI links to "Open as External Resource". This setting will open the link in a new window instead of rendering it in an iframe.
If you are using Firefox:
Go to browser Preferences => Privacy and Security => Custom, then toggle Cookies off.
Alternatively you can visit: about:preferences#privacy
If you want to continue blocking third party cookies for other websites, you can scroll down to "Cookies and Site Data" => Exceptions. Enter "labs.vocareum.com" in the field and click Allow.