Bug-Report: Install.sh Script For SPK Testnet Node Setup Not Working

I'm joining the SPK Network Testnet First Two-Week Sprint and this is my bug report regarding the install script for Full Installation.

I'm following the Full Install Step-by-Step Instructions from the SPK Testnet Node Setup Guide.

I'm already at step 4.

However, I got the following error when running install.sh.

User spk is not a part of the group spk. Add user to group and run this script again.

As per my debugging, the culprit is this line of code:

Already submitted a PR for its fix here: