The problemi syour Users, Security Group, and Other organizational units. You should just put the name of the organizational unit you are wanting. For example:

• Users: Users
• Security Groups: Groups
• Other: Computers,Another OU, Third OU, 

They don’t take distinguished names. If you leave them blank then CloudPanel puts all the objects in the company’s root OU.

Thankyou Jacob, now all fine

Chances on the distinguished name you entered on the setup page isn’t correct for the Hosting OU. Can you share what you put in? Change the name of your domain to something else when you share it though.

Hosting Distinguished Name: OU=Test_Panel,DC=services-t,DC=test,DC=ru (created)
Users Organizational Unit: OU=Users,OU=Test_Panel,DC=services-t,DC=test,DC=ru (created)
Security Group Organizational Unit: OU=Groups,OU=Test_Panel,DC=services-t,DC=test,DC=ru (created)
Other Organizational Units: OU=Test_Panel,DC=services-t,DC=test,DC=ru

Reseller and OU created normally in OU=Test_Panel,DC=services-t,DC=test,DC=ru, But creating a company for this reseller causes an error.