Hi @Eduard Sergienko welcome to the forum!
Instead of the MotionPath plugin, check out our DrawSVG plugin. I've copied your path and gave it the same style as the shape you had before. and instead of a shape following a path this animates the stroke-dashoffset (https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/stroke-dashoffset), you could animate this by hand, but that is going to require a lot of debugging and you'll have to fix some browser inconsistancies, which the DrawSVG plugins already solves for you! https://gsap.com/docs/v3/Plugins/DrawSVGPlugin/
I was not completely sure of your setup, so I just kept the bare minimum for it to work. Hope it helps and happy tweening!
https://codepen.io/mvaneijgen/pen/wvZomXM?editors=1010