Kindly carry out the Adobe technical check under the following link:
https://klett-sprachen.adobeconnect.com/common/help/de/support/meeting_test.htm
If necessary, contact the support provided by Adobe Connect ©. Kindly bear in mind that we can offer technical support to a limited extent, as the platform is a third-party provider.
In general, the following applies or often helps: empty the cache, close the browser and reopen the link.