Can't like/dislike on Web-Interface

Question

I created my account in Sololearn using android-app.
Now I can login also on my Computer (Firefox) and post questions/answers/comments etc.
BUT I cannot like/dislike anything in the browser. (I am asked to activate my account).

How can I fix this?

Answer 1

... Try activating your account?

Answer 2

Yes, it was that easy.
I just could not find the activation email ...
In the app everything worked without activation.