After upgrading to WHMCS 8 solusvmpro module settings are empty

Symptoms

1. After upgrading/installing WHMCS version 8 solusvmpro module settings in WHMCS > Setup > Products/Services > Products/Services > affected product > Module Settings are empty.

   Example of the issue

   

2. It is not possible to create/manage SolusVM VPS through WHMCS 8.

Cause

The installed solusvmpro module is outdated and does not support WHMCS 8 - WHMCS 8 support was implemented in release 4.1.2.

Resolution

Download the latest solusvmpro version and replace the installed version with it.