At some point I had a change in permissions on a folder, unfortunately I have no way to test a clean install of Hestia, however this created an error in the /var/log/nginx/error.log file as soon as I changed the permissions from admin:root, as I understand it should be www-data:root.
[crit] 80855#80855: opendir() "/var/cache/nginx/proxy_temp" failed (13: Permission denied)
The error disappeared, maybe it’s because I put admin user in the nginx domain configuration if I’m not mistaken.
If anyone can, please check the permissions. Thanks!