I need help with the problems I have with the HUB75 64X64 panel and my Raspberry Pico 2W

hi !
I’m a beginner who really needs help and after trying everything, I try on this forum hoping to find the solution.

I’m trying to control with my Pico 2W, the HUB75 LED panel, but it doesn’t make any sense. I feel like when I ask him to display one pixel, he displays a strange diagonal.

I tried to change the pins, to do it on CircuitPython and Arduino IDE, I took codes that were fully adapted but nothing works.

I tried to reproduce what Prof. G had done in this video (https://www.youtube.com/watch?v=vM3-0qyjfh8&t=850s) by adapting it to the 64X64 format, but here’s what it looked like.

(we cant really see but it respects the colors and order as in the video)

I also tried with 1 pixel and the same, that makes a diagonal, and exchanging pins will change the shape of the diagonal.

Please, I need help because for several hours I’ve been spinning on repeat and I’m really a beginner, but I believe in you!