I want to finish the registration. After clicking the activation link an error message is displayed saying that the activation key is invalid.

The activation link is valid only for 1 activation. If the link is double clicked the link will be invalid. In this case please request a new activation key:

Another cause for an invalid key is that your browser is blocking cookies. Please enter the URL of the E-Learning Portal in your white list for accepting cookies.

Whom can I contact in case of technical problems?

For questions regarding technical problems with the e-learning portal or incidents please write an email to

I have questions regarding the usage coursess, the portal and its functions.

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