It is more likely that you are denied access to the server with the specified opencart. For it is impossible to connect to it from the OneBox server.
tradeworkcomua@tradework ~/web1/web $ wget "
https://art-butik.com.ua"--2021-01-29 17:06:33--
https://art-butik.com.ua/Art-butik.com.ua (art-butik.com.ua) is recognized... 212.26.135.68
Connecting to art-butik.com.ua (art-butik.com.ua)|212.26.135.68|:443... error: Connection timed out.
Repeat.
--2021-01-29 17:08:41-- (attempt: 2)
https://art-butik.com.ua/Connection to art-butik.com.ua (art-butik.com.ua)|212.26.135.68|:443...