Hi @petro,
--standalone means that you don't have another web server running. It looks like that's not the case for your system. However, it also seems like your --preferred-challenges option was ignored because the challenge was tried with TLS-SNI-01 instead of HTTP-01!
In general, you should not specify options to renew because renew would otherwise remember what worked before and then do that. 
By contrast, if you specify things like --standalone, as arguments with renew, you might be changing the renewal method compared to the original issuance method.
What would happen if you just ran ./letsencrypt-auto renew? (optionally with --no-self-upgrade if it's important to you that Certbot not upgrade itself)