Hey Jitendra
thank you for your answer!
Both codes (yours and mine) work. The point was that I have chosen the wrong element. The right element is the "screen-containter". And it doesn't have to be !important.
.screen-container::-webkit-scrollbar {
width: 0;
}
.screen-container::-webkit-scrollbar {
display: none;
}
Best regards
Dimtiri