I have tried to figure out inserting bootstrap icon in topic and post

I can't find anyway to do this

Is there any method to insert boostrap icon in the topic without uploading a image

If you have problem and need help to solve the problem

you have to post the error or information of your problem

I think that your current certs is only stands for the specific domain
and you have to regenerate or renew your certs

have you tried typing domain without TLD or Including subdomain

like this

letsencrypt-auto certonly --rsa-key-size 4096 --standalone -d community.example.com

or

letsencrypt-auto certonly --rsa-key-size 4096 --standalone -d example.com -d www.example.com -d community.example.com