DNS Zone Not Working

Provider: Hetzner
Virtualization Type: CLOUD
System: Centos 7.5 ,

OLS or Enterprise?
OLS
Installing from official server or mirror server?
official
Replace JS/CSS files to JS Delivr?
no
Install Memcached extension for PHP?
no
Install LiteSpeed Memcached?
yes
Install Memcached?
no
Install Redis extension for PHP?
yes
Install Redis?
yes

Problem:

When I try to do DNS Zone Deleting but , it fails and show error message Websites matching query does not exist…

http://prntscr.com/oi6agf

Create this domain as normal website, then try to delete the zone.