Let's Encrypt SSL manual renew

Hello, please tell is it possible to renew the Let’s Encrypt SSL manually. For the past year i had to reinstall all from scratch 2 times as the auto renew does not work. Here is the message i get
Something unexpected went wrong: [NeedToInstallFile…
Can i install certbot and renew the SSL manually?

autorenew has worked fine for me for the past 2 years…

you should be able to use certbot, but use at your own risk.

Hi, thanks. I bit more help pls.
I followed this https://www.digitalocean.com/community/tutorials/how-to-secure-nginx-with-let-s-encrypt-on-ubuntu-14-04 tutorial on how to install Let’s Encrypt on nginx, however when i start to install the certificate i always end up with “ValueError: ‘new_authzr_uri’ in slots conflicts with class variable”

Also when i check the syntax with sudo "nginx -t"
The outcome is:

nginx: [warn] conflicting server name “domain.com” on, ignored
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

Am i close to the manual renew or far far away?