probably you have a conflict with other packages, seems you some very old packages installed, try remove them and see if sspring work, but in 2024 direct shape from spring doesnt work, cant remember with 2023…but just use that from synthezise is actuelly spring node but modfied a bit
I cleaned my package mess but still can’t see that node.
Synthesize node didn’t work since I had an older version of the package and I have error installing the latest package.
ImportInstance.ByGeometry worked for me for now! It created a smooth solid that I wanted.