Domain doesn't allow IP address for DNS

Hello, thank you for contacting Ucraft Support Service I’m Vartan and I’ll be happy to assist you today! 

To connect your domain to the Ucraft site go to the Edit mode of your site > navigate to your Dashboard > Domain App > Connect domain > Connect Existing Domain. 

Once you've filled in your domain name, you need to navigate to your domain provider's account and add the A-type DNS Records generated for you to your DNS Management Zone.

1. Host: @
   Data: 34.77.2.249
2. Host: www
   Data: 34.77.2.249
   The last step here would be moving to your Website's Dashboard > Domain App > Domain Settings and hitting the 'Check' button to finalize the process. 

You may also check out the following article that tells you how to connect the domain!