I am getting problems like:
It looks like your login session is no longer active, or no longer matches with the server. Please refresh this page.
We were unable to log you in, likely due to an expired session. Please try again.
The thing is; when I try from my computer, Safari and Chrome does not give error; but Safari on my tablet or Chrome on my phone also give similar sesson problems.
Setting are:
Ubuntu 16.04; dedicated server; plesk panel; apache server, nginx proxy.
CONFIG.JSON
{
"url": "https://forum.mydomain.com",
"secret": "xxxxxxxx",
"database": "mongo",
"port": 4567,
"mongo": {
"host": "127.0.0.1",
"port": "27017",
"username": "nodebb",
"password": "xxxxxxxxxx",
"database": "nodebb"
},
"type": "literal"
}
ON PLESK PANEL:
Additional nginx directives:
location ~ / {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header Host $http_host;
proxy_set_header X-NginX-Proxy true;
proxy_pass http://127.0.0.1:4567;
proxy_redirect off;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
}
Additional apache directives: none
I have near zero knowledge about nginx settings; so I've copied all things that are advised in similar questions 
Thanks for your help.