blending - Illustrator blend tool creating unwanted lines

I am attempting to create a long shadow on my icon by using this effect in Illustrator. When I use Object > Blend > Make it leaves white spaces between each shape it creates and looks extremely ugl

Compositing Highlights, Shadows & Reflections in Photoshop - PHLEARN

Blend Tool in Illustrator Steps to use Blend Tool in Illustrator

Create Colorful Blending Lines Pattern in Adobe Illustrator, Using Blend Tool

Clo3D Transparency Guide

Blend Mode: Seamless Image Blending for Designers in 1 click

Solved: My Blend tool looks terrible, help! - Adobe Community - 9220123

Illustrator: Expanding Blended Strokes - Graphic Design Stack Exchange

adobe illustrator - blend with morphing - Graphic Design Stack Exchange

logo - (illustrator) using blend tool to blend from a curve to hard angled shape - Graphic Design Stack Exchange

Compositing Highlights, Shadows & Reflections in Photoshop - PHLEARN

Taming Blend Modes: `difference` and `exclusion`

Pro-Tips: Blend Tool in Illustrator with Tyler Pate

How To Create a Contour Map Effect in Illustrator

Why can't the lines between two blended parallel lines be selected in Illustrator, as they're not shapes? - Quora

How To Create a Contour Map Effect in Illustrator