Uncaught TypeError: Cannot read properties of undefined (reading 'url')
The error message you provided is from JavaScript and indicates that there is an issue in your code. Specifically, it's saying that you're trying to access the 'url' property of an undefined object, and this is causing a "Cannot read properties of undefined" error.
To fix this issue, you'll need to identify where in your code this problem is occurring. Based on the stack trace, it seems like the error is happening in the 'gallery-metabox.js' file at line 27.
Here are some steps you can take to troubleshoot and fix the issue:
Check the 'gallery-metabox.js' file:
Open the 'gallery-metabox.js' file and go to line 27. Look for the code that is trying to access the 'url' property of an object. Make sure that the object you are trying to access is defined and has a 'url' property. If it's not defined, you'll need to address this issue.
Check the data source:
The error message suggests that the issue might be related to data from a collection or an API response. Ensure that the data you are working with is properly loaded and has the expected structure.
Use console.log:
You can add some console.log statements to debug and see the values of the variables and objects in your code. This can help you identify which part of your code is causing the error and what's going wrong.