Thanks for your replies.
My domain is perfectly fine. It doesnt work actually because my certificate expired. I hit the 5 per week limit while trying to solve my problem.
[root@proxy ~]# ls -lR /etc/letsencrypt/
/etc/letsencrypt/:
total 36
drwx------ 3 root root 4096 Feb 24 12:07 accounts
drwx------ 4 root root 4096 Feb 24 15:38 archive
drwxr-xr-x 2 root root 4096 May 25 22:07 csr
drwx------ 2 root root 4096 May 25 22:07 keys
drwx------ 4 root root 4096 Feb 24 15:40 live
-rw-r--r-- 1 root root 1143 Feb 24 12:07 options-ssl-nginx.conf
drwxr-xr-x 2 root root 4096 May 25 21:37 renewal
drwxr-xr-x 5 root root 4096 Feb 24 12:07 renewal-hooks
-rw-r--r-- 1 root root 424 Feb 24 12:07 ssl-dhparams.pem
/etc/letsencrypt/accounts:
total 4
drwx------ 3 root root 4096 Feb 24 12:07 acme-v02.api.letsencrypt.org
/etc/letsencrypt/accounts/acme-v02.api.letsencrypt.org:
total 4
drwx------ 3 root root 4096 Feb 24 12:07 directory
/etc/letsencrypt/accounts/acme-v02.api.letsencrypt.org/directory:
total 4
drwx------ 2 root root 4096 Feb 24 12:07 15723e13619371d1cce003f7d53fee05
/etc/letsencrypt/accounts/acme-v02.api.letsencrypt.org/directory/15723e13619371d1cce003f7d53fee05:
total 12
-rw-r--r-- 1 root root 77 Feb 24 12:07 meta.json
-r-------- 1 root root 1632 Feb 24 12:07 private_key.json
-rw-r--r-- 1 root root 78 Feb 24 12:07 regr.json
/etc/letsencrypt/archive:
total 8
drwxr-xr-x 2 root root 4096 May 25 21:33 pandore.xyz
drwxr-xr-x 2 root root 4096 Feb 24 15:38 pandore.xyz-0001
/etc/letsencrypt/archive/pandore.xyz:
total 32
-rw-r--r-- 1 root root 1903 Feb 24 12:19 cert1.pem
-rw-r--r-- 1 root root 1907 May 25 21:33 cert2.pem
-rw-r--r-- 1 root root 1647 Feb 24 12:19 chain1.pem
-rw-r--r-- 1 root root 1647 May 25 21:33 chain2.pem
-rw-r--r-- 1 root root 3550 Feb 24 12:19 fullchain1.pem
-rw-r--r-- 1 root root 3554 May 25 21:33 fullchain2.pem
-rw------- 1 root root 1704 Feb 24 12:19 privkey1.pem
-rw------- 1 root root 1700 May 25 21:33 privkey2.pem
/etc/letsencrypt/archive/pandore.xyz-0001:
total 16
-rw-r--r-- 1 root root 1907 Feb 24 15:38 cert1.pem
-rw-r--r-- 1 root root 1647 Feb 24 15:38 chain1.pem
-rw-r--r-- 1 root root 3554 Feb 24 15:38 fullchain1.pem
-rw------- 1 root root 1704 Feb 24 15:38 privkey1.pem
/etc/letsencrypt/csr:
total 64
-rw-r--r-- 1 root root 928 Feb 24 12:08 0000_csr-certbot.pem
-rw-r--r-- 1 root root 920 Feb 24 12:18 0001_csr-certbot.pem
-rw-r--r-- 1 root root 924 Feb 24 14:50 0002_csr-certbot.pem
-rw-r--r-- 1 root root 924 Feb 24 14:50 0003_csr-certbot.pem
-rw-r--r-- 1 root root 924 Feb 24 15:29 0004_csr-certbot.pem
-rw-r--r-- 1 root root 924 Feb 24 15:35 0005_csr-certbot.pem
-rw-r--r-- 1 root root 940 Feb 24 15:42 0006_csr-certbot.pem
-rw-r--r-- 1 root root 924 May 5 17:41 0007_csr-certbot.pem
-rw-r--r-- 1 root root 924 May 5 17:44 0008_csr-certbot.pem
-rw-r--r-- 1 root root 924 May 25 21:07 0009_csr-certbot.pem
-rw-r--r-- 1 root root 924 May 25 21:08 0010_csr-certbot.pem
-rw-r--r-- 1 root root 924 May 25 21:08 0011_csr-certbot.pem
-rw-r--r-- 1 root root 924 May 25 21:33 0012_csr-certbot.pem
-rw-r--r-- 1 root root 924 May 25 21:33 0013_csr-certbot.pem
-rw-r--r-- 1 root root 924 May 25 21:37 0014_csr-certbot.pem
-rw-r--r-- 1 root root 924 May 25 22:07 0015_csr-certbot.pem
/etc/letsencrypt/keys:
total 64
-rw------- 1 root root 1704 Feb 24 12:08 0000_key-certbot.pem
-rw------- 1 root root 1704 Feb 24 12:18 0001_key-certbot.pem
-rw------- 1 root root 1704 Feb 24 14:50 0002_key-certbot.pem
-rw------- 1 root root 1704 Feb 24 14:50 0003_key-certbot.pem
-rw------- 1 root root 1704 Feb 24 15:29 0004_key-certbot.pem
-rw------- 1 root root 1704 Feb 24 15:35 0005_key-certbot.pem
-rw------- 1 root root 1704 Feb 24 15:42 0006_key-certbot.pem
-rw------- 1 root root 1704 May 5 17:41 0007_key-certbot.pem
-rw------- 1 root root 1708 May 5 17:44 0008_key-certbot.pem
-rw------- 1 root root 1704 May 25 21:07 0009_key-certbot.pem
-rw------- 1 root root 1704 May 25 21:08 0010_key-certbot.pem
-rw------- 1 root root 1704 May 25 21:08 0011_key-certbot.pem
-rw------- 1 root root 1708 May 25 21:33 0012_key-certbot.pem
-rw------- 1 root root 1700 May 25 21:33 0013_key-certbot.pem
-rw------- 1 root root 1704 May 25 21:37 0014_key-certbot.pem
-rw------- 1 root root 1704 May 25 22:07 0015_key-certbot.pem
/etc/letsencrypt/live:
total 12
drwxr-xr-x 2 root root 4096 May 25 21:33 pandore.xyz
drwxr-xr-x 2 root root 4096 Feb 24 12:19 pandore.xyz.bckp
-rw-r--r-- 1 root root 740 Feb 24 12:19 README
/etc/letsencrypt/live/pandore.xyz:
total 4
lrwxrwxrwx 1 root root 40 May 25 21:33 cert.pem -> ../../archive/pandore.xyz-0001/cert1.pem
lrwxrwxrwx 1 root root 41 May 25 21:33 chain.pem -> ../../archive/pandore.xyz-0001/chain1.pem
lrwxrwxrwx 1 root root 45 May 25 21:33 fullchain.pem -> ../../archive/pandore.xyz-0001/fullchain1.pem
lrwxrwxrwx 1 root root 43 May 25 21:33 privkey.pem -> ../../archive/pandore.xyz-0001/privkey1.pem
-rw-r--r-- 1 root root 692 Feb 24 15:38 README
/etc/letsencrypt/live/pandore.xyz.bckp:
total 4
lrwxrwxrwx 1 root root 35 Feb 24 12:19 cert.pem -> ../../archive/pandore.xyz/cert1.pem
lrwxrwxrwx 1 root root 36 Feb 24 12:19 chain.pem -> ../../archive/pandore.xyz/chain1.pem
lrwxrwxrwx 1 root root 40 Feb 24 12:19 fullchain.pem -> ../../archive/pandore.xyz/fullchain1.pem
lrwxrwxrwx 1 root root 38 Feb 24 12:19 privkey.pem -> ../../archive/pandore.xyz/privkey1.pem
-rw-r--r-- 1 root root 692 Feb 24 12:19 README
/etc/letsencrypt/renewal:
total 8
-rw-r--r-- 1 root root 577 Feb 24 15:38 pandore.xyz-0001.conf.bckp
-rw-r--r-- 1 root root 517 May 25 21:33 pandore.xyz.conf
/etc/letsencrypt/renewal-hooks:
total 12
drwxr-xr-x 2 root root 4096 Feb 24 12:07 deploy
drwxr-xr-x 2 root root 4096 Feb 24 12:07 post
drwxr-xr-x 2 root root 4096 Feb 24 12:07 pre
/etc/letsencrypt/renewal-hooks/deploy:
total 0
/etc/letsencrypt/renewal-hooks/post:
total 0
/etc/letsencrypt/renewal-hooks/pre:
total 0