Certbot failed to authenticate some domains (authenticator: nginx) Timeout during connect (likely firewall problem)

I found this and this but I have no idea what to do with this information :smiley: (it might seam I can't put 2+2 together)

I'm trying to find a step-by-step guide, because unfortunately this is my expertise level on this stuff. I'm a mechanic by trade not a techninja, but I like to get out of my conforst zone :wink:

If someone could point me a direction I'll appreciate!