502 Bad Gateway

Been working on a site for a little while now, and whenever i do something with the site, i.e uploading/installing plugins/templates i keep getting “502 Bad Gateway” this is becoming anoying…
Please can you check site/server.
Free hos or paid i need stability in order to work.

Also, i’ve tried to install/create a SSLCertificate. it wont let me ?

Thank you,

The site is working fine for me now.

If you’re having trouble with SSL, can you please explain more about the problem?