Single-family house 1 year old water is pressing in - what could it be?

Have you placed the stones? Where is the sealing between the stone and the wall? No wonder water is getting in.

Hello, the stones were already there before, in the summer everything was dry - now today it has become even more and it has not rained

Could it possibly be condensation?

So I absolutely cannot make out anything from the pictures. In particular, it is difficult to reconcile the interior pictures with the exterior pictures. The text is also too brief and only raises questions. The best thing is to have an expert come briefly and assess the situation on site.

In my opinion, the problem cannot be solved based on photos and explanations. You should commission a construction expert to conduct an assessment. However, you should have a certified expert recommended to you by the relevant Chamber of Crafts, because there are quite a few in this professional field whom you would rather not hire.