Expected behavior

Successful page render

Actual behavior

Resources (screenshots, code snippets, etc.)

I had changed versions of some packages after that the error started occurring.I changed my react, react-dom, and mdbreact versions to the previous versions when they were not giving errors, but the error still persists.

Having error in uploading images, but here are the contents of package.json

when code was working

{
  "name": "client",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@material-ui/core": "^4.11.3",
    "@material-ui/lab": "^4.0.0-alpha.57",
    "@testing-library/jest-dom": "^5.11.4",
    "@testing-library/react": "^11.1.0",
    "@testing-library/user-event": "^12.1.10",
    "bootstrap": "^4.6.0",
    "mdbreact": "^5.0.1",
    "react": "^17.0.1",
    "react-bootstrap": "^1.5.1",
    "react-dom": "^17.0.1",
    "react-router-dom": "^5.2.0",
    "react-scripts": "4.0.3",
    "web-vitals": "^1.0.1"
  },

made some package changes.... got error....reverted back to original react, react-dom, and mdbreact versions

{
  "name": "client",
  "proxy": "http://127.0.0.1:5000",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@material-ui/core": "^4.11.3",
    "@material-ui/lab": "^4.0.0-alpha.57",
    "@testing-library/jest-dom": "^5.11.4",
    "@testing-library/react": "^11.1.0",
    "@testing-library/user-event": "^12.1.10",
    "axios": "^0.21.1",
    "bootstrap": "^4.6.0",
    "mdbreact": "^5.0.1",
    "react": "^17.0.1",
    "react-bootstrap": "^1.5.1",
    "react-dom": "^17.0.1",
    "react-redux": "^7.2.2",
    "react-router-dom": "^5.2.0",
    "react-scripts": "4.0.3",
    "redux": "^4.0.5",
    "redux-thunk": "^2.3.0",
    "uninstall-all-modules": "^1.0.5",
    "web-vitals": "^1.0.1"
  },

Also I don't have removed React.StrictMode