The mud

There is a groove at the bottom of the back wall; when filling and washing, water appears in it and gurgles; sometimes drops fly out of the machine. This is fine? Or did they forget to put a gasket there?

We bought this miracle made in China. In principle, everything is fine, but the risk at the end of the cycle does not allow using it at night, since a small child sleeps lightly (I didn’t find an answer to this question in the instructions. Kind people, tell me, maybe someone knows?

We can’t turn on the machine (first start), the time indicator lights up and that’s it, the “program” button doesn’t react at all, what could be the problem?

In general, I recently encountered a problem, I turn on the PMM mode, water is drawn in... It draws water and stops with error E2. I read various tips that it could be a pressure switch, or a blockage. or just a software error. They advised to disconnect from the network and wait. I unplugged it and immediately went to take it apart to look at the blockage. I opened the side wall and there was...