Gentlemen, please help, I read the entire thread and found no answer.
When starting the installation, I created an installer account and had access to my installation, after a few days the installer told me to delete my installer account (error) and from then on I cannot see my installation "remotely". After a few weeks, Huawei's support removed this installation (confirmed by e-mail) from the cloud. After all, not wanting to spoil anything, I waited for the installer, but he did not manage to return the installation, the known text sold it was the first time, etc. I set up a new installer account, but unfortunately, like the installer, I also failed to add the installation, previously went without any problem. Have you encountered such a problem? I will add that the installation works correctly, you can log in directly, but when putting the installation into use via Quick Setup, the following window pops up:

I perform all activities during the so-called insolation.
Support is spreading his hands at the moment, I sent them logs from the dongle and inverter, but maybe someone here will help me?