Yep, thanks for the help, the activation has been reset.

However new issue has appeared:
it seems that the theme has been installed incorrectly (however, no errors have appeared while installing and activating the theme – that has been done through an installable wordpress file),
and now I have a bunch of errors on the main screen of the site as well as in the console.

I have sent to you my credentials in the private area.

Will be most grateful for any help or advice.

Alexander.