Fixed mui core finally

frontend/src/components/OrgHeaderexpanded.jsx

@@ -1,8 +1,8 @@
 import React, { useEffect } from "react";
 
-import { makeStyles } from "@material-ui/styles";
-import { useTheme } from "@material-ui/core/styles";
+import { makeStyles } from "@mui/styles";
 import { useAlert } from "react-alert";
+import theme from '../theme.jsx';
 
 import {
   FormControl,
@@ -23,9 +23,9 @@ import {
   Tabs,
   Tab,
   Grid,
-} from "@material-ui/core";
+  IconButton,
+} from "@mui/material";
 
-import IconButton from "@material-ui/core/IconButton";
 import {
 	ExpandLess as ExpandLessIcon, 
 	ExpandMore as ExpandMoreIcon, 
@@ -48,7 +48,6 @@ const OrgHeaderexpanded = (props) => {
 		adminTab,
   } = props;
 
-  const theme = useTheme();
   const alert = useAlert();
   const classes = useStyles();
   const defaultBranch = "master";