[material-ui] Fix: [Tooltip] When wrapping an input which is disabled…

… while focused an error is thrown mui#45373

Signed-off-by: Sarathkumar <[email protected]>

packages/mui-material/src/Tooltip/Tooltip.js

@@ -488,14 +488,11 @@ const Tooltip = React.forwardRef(function Tooltip(inProps, ref) {
     // Workaround for https://github.com/facebook/react/issues/7769
     // The autoFocus of React might trigger the event before the componentDidMount.
     // We need to account for this eventuality.
-    if (!event) {
-      return;
-    }
     if (!childNode) {
       setChildNode(event.currentTarget);
     }
 
-    if (isFocusVisible(event.target)) {
+    if ( event && isFocusVisible(event.target)) {
       setChildIsFocusVisible(true);
       handleMouseOver(event);
     }