Looks like you have fixed the error. Checking your ip + domainname as hostname lists now
CN=beta-yegfitness.fitchek.com
18.03.2019
16.06.2019
expires in 89 days beta-yegfitness.fitchek.com - 1 entry
And the domain beta-yegfitness.fitchek.com has four Cloudflare ip addresses and a big Cloudflare certificate:
CN=sni116869.cloudflaressl.com, OU=PositiveSSL Multi-Domain,
OU=Domain Control Validated
05.12.2018
14.06.2019
expires in 87 days
Some missing files ... Grade I.