I just bought the Shockingly package and did a simple CDN install. My animations were working fine in the sandbox version, but when I switched over I got the below. I worked out that if I reverted to the 3.5.1 CDN version of ScrollTrigger (instead of 3.12.2) the error went away. Of course, using two different versions of modules can't be a good thing...
The actual code I was running was - but every time I called gsap to or fromto it choked.
gsap.fromTo(".flag_paths",
{ drawSVG: "0%" }, {
scrollTrigger: {
trigger: "#part1",
start: "10% 80%",
end: "40% 90%",
endTrigger: "#part1",
containerAnimation: flagfix,
scrub: 1,
markers: false,
},
drawSVG: "100%"
});