Spline sampler debugging doesn't work

Hello everyone, guys. The other day I had a problem that I just can’t solve. I looked through a bunch of guides, and I couldn’t find a single suitable option for solving my problem. The thing is that when I try to enable debugging mode on the Spline sampler, nothing happens. The cubes do not appear and I cannot advance further. Has anyone encountered this? Or knows a solution to this problem? I am attaching screenshots.




i have a same problem.