Could be all, wrong set alias, some nginx config issue - with that amount of informations it is impossible to help. You need to do the first debug steps on your own, we can’t login, and also don’t want to provide free support on remote systems.
Also, just to state it again: Hestia isnt a replacement for sysadmin knowledge, it’s a product to make their life easier. For example you still should know how to configure nginx manualy.
This is nothing meant in any case offensive, it just should show what we expect from our community and what we can and will support.