As your application error message explained, unfortunately your version of Designer can not support opening this material.
It is because it was made with nodes created recently and which are not included in your version of Substance Designer.
You are able to open the "climbing rope" sbs as it was made with an older version of the program.
It won't be possible for you to open and modify the graph with your current version of Substance Designer.
If you have the possibility to update your version of designer, you'll be able to work on it as usual.
If you can't upgrade, you have the possiblity to open the material (the .sbsar version) in the free Substance Player desktop tool, and you'll be able to tweak the parameters and export the maps.