Unclear warning in console

[Krisxtina]

Hello. I have warning in console, I don`t understand why and how to remove it. Could you please help me? 
I use "nuxt": "^2.15.7", "pixi.js": "^5.0.0", "gsap": "^3.7.1"

My file.js as plugin in nuxt.config

import * as PIXI from 'pixi.js'

import { gsap } from 'gsap';

import { PixiPlugin } from "gsap/PixiPlugin";

import { assetsMap } from '@/static/pixi/assetsMap';

if (process.client) { gsap.registerPlugin(PixiPlugin); }

PixiPlugin.registerPIXI(PIXI);