Unable to create a subscription or domain: the IP pool is empty

• Clicking Subscriptions > Add subscription or Domains > Add domain one of the following error messages appear:

  PLESK_WARN: Unable to create a subscription: the IP pool is empty.

  ---

  PLESK_ERROR: Unable to create a subscription because there are no shared IP addresses and no free dedicated IP addresses in Plesk

• Some of the packages are marked as not installed in Tools & Settings > Server Components or menu itself is empty.

Cause

System packages were not configured.

Resolution

1. Connect to the server using SSH;

2. Check the list of not configured packages: 

   # dpkg --list | grep -v ii
   iU apache2 2.4.7-1ubuntu4.9 amd64 Apache HTTP Server
   iU apache2-bin 2.4.7-1ubuntu4.9 amd64 Apache HTTP Server (binary files and modules)

3. Finish configuration of system packages:

   # dpkg --configure -a

4. Reinstall Plesk updates;

5. Browse to Tools & Settings > Server Components and click Refresh button to update information.