What does TypeError mean: cannot read undefined properties (reading '_gsap')?

[Kimbal]

I'm so sorry but I don't know what this means. I am using Premium Plugin. I installed both npm  and zip separately. Since you thought there might be a problem with Pnm, I completed the installation again with npm. It was a great sadness for me that gsap was not working.

[GreenSock]

It's very difficult to troubleshoot without a minimal demo, but my guess is that maybe your target element doesn't exist(?)

 

If you still need some help, please make sure you post a minimal demo that clearly illustrates the issue (like a Stackblitz). Here's a starter template you can fork: https://stackblitz.com/edit/react-cxv92j