The error message "Cannot read properties of undefined (reading 'data')" occurs when you are trying to access a property of an object that is undefined. This typically happens when you are trying to access a property of an object that does not exist or has not been initialized properly.
In order to fix this error, you need to first check if the object you are trying to access actually exists before trying to access its properties. You can do this by using conditional statements to check if the object is defined before accessing its properties.
Here is an example of how you can modify your code to avoid this error:
```javascript
if (myObject && myObject.data) {
// Access the property 'data' if 'myObject' exists
// Do something with myObject.data
} else {
// Handle the case where 'data' property is undefined
}
```
By adding this simple check before accessing the 'data' property of the object, you can avoid the error message and ensure that your code does not break when dealing with undefined properties.
Additionally, you may also want to consider improving the error handling in your code to gracefully handle cases where properties are undefined or data cannot be retrieved from the database. This can help provide a better user experience and make your code more robust.