Why is the Apple Touch Icon loaded via HTTP instead of HTTPS?

1. For ./launcher logs app I can see:

www.example.com:Verify error:DNS problem: NXDOMAIN looking up A for www.example.com

(that’s for the root, not for the discourse install, which is under www.community.example.com)

And also:

Reload error for : Started runsvdir, PID is 326
ssyslogd: command 'KLogPermitNonKernelFacility' is currently not permitted

Domains not changed.
Add '--force' to force to renew.
Installing key to:/shared/ssl/comunity.example.com.key
Run reload cmd: sv reload nginx

2. For ls -l /var/discourse/shared/standalone/ssl I get:

total 8
-rw-r--r-- 1 ubuntu root 3924 Dec 18 03:56 community.example.com.cer
-rw------- 1 ubuntu root 3247 Dec 18 04:24 community.example.com.key

Should I try and manually reissue the cert following instructions here Set up HTTPS support with Let's Encrypt?