Link don't start out of eMail

I have the problem, that no link is possible to start out of eM Client after the last update!
What ist wrong at the software eM Client? This will go on at starting the PC and go to eM Client to read the messages. If there ist a link in it, it comes a failure message.

Please give a feedback what to do! Thank you for response.

Please restart Windows and try again.

If you get an error, can you provide a screenshot, or the text of the error message?