You want to start CASK, but recieve the error message 'ERROR_001 NO LRS'.

Regarding solution 1. 'Adding CASK sites to Trusted Sites'
Security settings in your web browser may be set so restrictive that certain functionality of web sites is blocked and will not work. If you trust the web site, you may add it to 'Trusted Sites'. Typically, the security settings for 'Trusted Sites' are more relaxed, usually allowing the functionality that was blocked.

Regarding solutions 2 and 3. 'Switching off Privacy settings'
The setting that causes a problem here, is the Privacy setting that prevents a web page to 'read' from which site it is referred. Boerhaavenet checks whether you were referred to it from www.medischonderwijs.nl. If it is not allowed to know the referrer, the log-in checks break, resulting in the ERROR01_NO LRS error.