Hello, friend! Some external guy (outside of this forum) supported me.
And his hint was to double-check the conctact form. Namely: “When You are creating the field of contact form, each of these fields receives the key and these keys You must enter to the E-Mails` template, which You are going to receive” – see the screen shot here https://prnt.sc/vs9hvf
Rgds
Vitaliy
