Hello
a short feedback.
Nginx is running, but is no longer recognized by the software.
No Plesk error !
the second:
lets encrypt still does not secure the web server properly. Furthermore the DNS error.
In the meantime, I plan to purchase of a server certificate.
@UHolthausen
I would not recommend to purchase anything.
To be honest, I would recommend to change your hosting provider as soon as possible.
After all, these kind of odd problems should not occur at all - even when not being an expert, an out-of-the-box Plesk instance would allow the end-user to run Nginx, Apache and almost every kind of regular application (like WP or something similar) without any problem : if there are some problems with hosting, then those problems are the actual endresult of a messed up customization or config on the server-side - and that server is maintained by your hosting provider.
Kind regards......