Uncaught TypeError: Cannot read properties of null (reading 'define')

[krasheed1995]

getting error in line number - lottie-player.js 31

var n$1=t=>e=>"function"==typeof e?((t,e)=>(window.customElements.define(t,e),e))(t,e):((t,e)=>{var{kind:r,elements:i}=e;return{kind:r,elements:i,finisher(e){window.customElements.define(t,e)}}})(t,e)

Uncaught TypeError: Cannot read properties of null (reading 'define')

i use it for browser extension in content scripts. when i go to any webpage and inspect the page i get this error.
the script is downloaded from https://unpkg.com/@lottiefiles/lottie-player@2.0.4/dist/lottie-player.js