Help I can't make a solid rope, it always breaks. Help.

[acaremre]

I have a project that I will use completely rope mechanics and I am just at the beginning of the road. What I have to do is make a rope that doesn't go through anything, like a solid and unbreakable thick rope. Can you help me ?
Attached is the video of the problem I am having, I am sharing it in the link.
https://streamable.com/hh98nr