heroku error: @material-ui/core

client/package.json

@@ -4,6 +4,7 @@
   "private": true,
   "homepage": "https://mohiit1502.github.io/PictureStory-v2",
   "dependencies": {
+    "@material-ui/core": "^4.8.2",
     "@svgr/webpack": "4.3.2",
     "@typescript-eslint/eslint-plugin": "^2.14.0",
     "@typescript-eslint/parser": "^2.14.0",
@@ -160,7 +161,6 @@
     "@babel/plugin-transform-react-jsx": "^7.7.7",
     "@babel/preset-env": "^7.7.7",
     "@babel/preset-react": "^7.7.4",
-    "@material-ui/core": "^4.8.2",
     "@material-ui/icons": "^4.5.1",
     "body-parser": "^1.19.0",
     "plop": "^2.5.3"