OK, we did it but an unexpected problem just occurred. Actually, all is working except that admin area looks ruined when accessed with https. With HTTP it is ok. Look at the print screen please : https://prnt.sc/iqs3lh Guys from hosting are confused, so they told me to ask next:
I suggest that developers clarify the recommendations for setting up the "revive adserver" to work with the software nginx (frontend) + apache (backend) + php-fpm
Perhaps we are missing some small, but very important setting.
P.S. in the documentation on their site I did not find the technical description, only general settings