Error Code: MCWHI001

The installation cannot be performed because the script cannot find WHMCS\Database\Capsule class. It is a required class included by default in WHMCS since version 6.3.
Your system may require an update. MetricsCube supports WHMCS V6.3 and later only.

Suggested Solution

Please make sure that you are using a compatible with MetricsCube version of WHMCS, that is V6.3 and later.