Unable scan domain by Composer applications: There is no web hosting configured on the domain

Symptoms

• After pressing the Scan button in Subscriptions > example.com > PHP Composer, the process fails with the error:

  Could not scan domains for Composer applications: There is no web hosting configured on the domain

• In an attempt to perform the same on the subdomain.example.com the error message is following: 

  The domain was scanned. No applications were found.

• The domain forwarder is created within the example.com subscription.

Cause

This is the composer extension bug with ID #EXTPHPCOMP-114.

Resolution

As a workaround, create a domain alias with the forwarding functionality using the steps below:

Note: in the example below the name of the domain forwarder is example.net. 

1. Log into Plesk.
2. Go Subscriptions > example.com > example.net.
3. Remove example.net forwarder using the steps that are shown on the screenshot:
   
4. Press Add Domain Alias in Subscriptions > example.com.
5. In the Domain alias name* field specify the name of the required destination website and press the OK button: