Mac 10.14.2 Snapshot warning: inode_val, object has invalid bsd flags
Thanks to Olleg's link in his answer, it becomes clear that to find the file referenced in Disk Utility's error message has to be converted to an inode number first.
The "oid" (object ID) is hexadecimal, while the "inum" (inode number) is decimal.

You can either manually convert it to decimal, or use one of the many online converters.

In your case with an OID 0x3024a71c3, the converted inode number is 12923335107.
To search for the file with the inode number (inum), launch Terminal from /Applications/Utilities/, or find it via Spotlight and type:

find / -inum 12923335107 -print 2&gt; /dev/null


This should show you the file in question, including path, in its output.

In Olleg's link this seems common for the OneDrive folder.

The inode is also shown, when running a file system check with the debug flag (-d) on the container: fsck_apfs -d
Example: APFS: fsroot tree is invalid after Time Machine backup - how to recover and avoid in the future?