The error message you're encountering, "Nie można ukończyć tej operacji. (Błąd NSFileProviderErrorDomain -2005)," translates from Polish to "Unable to complete this operation. (Error NSFileProviderErrorDomain -2005)."
This typically indicates an issue with accessing or interacting with a file in the Files app, often related to iCloud Drive or a third-party file provider (such as Dropbox, OneDrive or Google Drive). The error code "-2005" generally points to a problem with the file provider's ability to handle the request.
Either you have logged out from iCloud Drive on your device or yet to Set up iCloud Drive on your iPhone.
If you had those files on other Cloud Drives (Google Drive, OneDrive, DropBox, Flickr, box, AmazonDrive, Adobe Creative Cloud etc) Then please log into them before you can access those files on Files App.
Ensure that the server that is hosting the Drives is up and active. --> https://downdetector.in/