How to remove stripes in MetroUI Windows Forms C#?

Question

.NET

When using metroTabControl, bars appear constantly on the left. I can't figure out why or how to remove it.
I use the NuGet package MetroModernUI 1.4,0
Maybe someone came across?
When you click on them, they disappear. They appear only at the start of the form and remain until you click there.

Answer 1

Figured it out, it's a scrollbar, set the values ​​to 0.