[SOLVED:] Migration Toolkit resulted in sites giving PR_END_OF_FILE_ERROR when accessing them

I tried both to enable SSL and LE at the same time, and to fisrt enable SSL, let the ISPC3 cronjob run and then check LE and let the cronjob run again. Both failed to create a certificate.

There is one thing I found in /root/.acme.sh/http.header : it says nginx, but my server is an Apache2 server.

Code:

HTTP/2 200
server: nginx
date: Fri, 23 Apr 2021 14:19:35 GMT
content-type: application/json
content-length: 186
boulder-requester: 120293510
cache-control: public, max-age=0, no-cache
link: <https://acme-v02.api.letsencrypt.org/directory>;rel="index"
link: <https://acme-v02.api.letsencrypt.org/acme/authz-v3/12566273403>;rel="up"
location: https://acme-v02.api.letsencrypt.org/acme/chall-v3/12562673403/U5HWQg
replay-nonce: <some-stuff-that-seem-unique-hence-I-deleted-it>
x-frame-options: DENY
strict-transport-security: max-age=604800

 

A misconception on my end I guess
https://www.howtoforge.com/community/threads/results-of-migration-toolkit-pre-sales-questions.86836/

In the above thread, see bullet 4, I asked about certificates and I got a response that certificates are not based on the IP. I misinterpreted this to that I would not have to set the DNS to point to the right IP and ignored that part.
When I updated the DNS, the certificate was issued.

All good! Peace!

 

I know. Of course I also know that the DNS must be updated to have it point to the right server , it was just that I misinterpreted when this should/could be done. My bad.

 

May I ask one thing? Now since the time between the finalized migration and this time right now, mails has come in to the source server, websites have been updated with order info etc and I need that in the target server. Is there an easy way to do some resync of the server before I update the DNS with the new IPs. The TTLs are set to 1 minute now so it should go fairly fast once ready.