Installer fails with unclear message if port 4000 is already in use

[shadow-absorber]

Prerequisites

• I have read CONTRIBUTING.md

Rayhunter Version

v0.10.1

Device

Tplink M7350

Installer OS

Linux

Describe the Issue

The installer for the TPlink M7350 fails with the following not very descriptive error if port 4000 is used by another userspace or root process
on first flash
after flashing successfully once it seems able to pass through the error