I did a clean install again and now it seems te work. The former install was also a clean one.
Don't know what went wrong, I'm happy it works now.

Case closed

Hi, When I start from the terminal, wolfram. I get sometimes the editor mode where I can enter my expressions. But mostmy, after I started mathematica I get the message in the terminal Mathematics cannot find a valid password For automatic web activation enter your activation key Then it comes with ...

Hi tnx for your advice.

Unfortunately this was also the first option I tried.
But it didam not help. May be I should create a new sd card.
Afaik no registration is needed at Wolframs site?

So when someone has an idea how to solve this problem I'll give it a try.

Tnx Ben

I'm using the B+.
Registring at Wolfram does not work either.

Hi, I'm new to this group and just entering because I've got al license issue when starting Mathematica. When I start Mathematica I get the following screen: $Failed. The Wolfram language kernel was not able to start due to license terms. For more information or assistance please contact Wolfram res...