How to find a file which can't be found on macOS Big Sur After updating to the latest version of macOS Big Sur, I've noticed strange system behavior. Now while opening the system I'm getting a popup where there is the information:

The file can't be found.


I want to file this file, but the difficultly about it is, I cannot find out what file is the problem about, or at least narrow the problem to the program or location, where I should look for it.
Any tips on how narrow the problem would be appreciated.
PS. Clicking the question mark icon is not helping, opening a blank page without any content.
I see the exact same thing. I noted the time (09:35:25) and found this in Console:
Nov 14 09:35:24 Honu amsaccountsd[673]: objc[673]: Class AMSDaemonConnectionInterface is implemented in both /System/Library/PrivateFrameworks/AppleMediaServices.framework/Versions/A/AppleMediaServices and /System/Library/PrivateFrameworks/AppleMediaServices.framework/Versions/A/Resources/amsaccountsd. One of the two will be used. Which one is undefined.
Nov 14 09:35:24 Honu amsaccountsd[673]: objc[673]: Class AMSXDProtoMessage is implemented in both /System/Library/PrivateFrameworks/AppleMediaServices.framework/Versions/A/AppleMediaServices and /System/Library/PrivateFrameworks/AppleMediaServices.framework/Versions/A/Resources/amsaccountsd. One of the two will be used. Which one is undefined.

Nov 14 09:35:25 Honu MRT[674]: getattrlist failed for : #2: No such file or directory
Nov 14 09:35:29 --- last message repeated 2 times ---

Nov 14 09:35:29 Honu mdsync[694]: objc[694]: Class MDSPathFilter is implemented in both /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/Metadata.framework/Versions/A/Metadata and /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/Metadata.framework/Versions/A/Support/mdsync. One of the two will be used. Which one is undefined.
Nov 14 09:35:30 Honu com.apple.xpc.launchd[1]

So it seems to have to do with something called &quot;getattrlist&quot;.
Here's a link that might be of help:
https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/getattrlist.2.html
That said, I still don't really know what this is but now I now know that I'm not the only one with this issue.
I know that this is likely not much help. If I find out more, I will post back.