Error unable tot add ... to contents: can't get mod time for file

I use Kopia to backup my data to a NAS drive on Windows with SMB share.
When i use this command: ‘snapshot verify --verify-files-percent=100’, i get multiple errors:

Processed 50 objects.
ERROR unable to add f60610d04a07757d3c44f4a1ff4ce3a7.1103.2.0 to contents: can’t get mod time for file “C:\Users\Admin
istrator\AppData\Local\kopia\8b35017875c33a80\contents/f6/0610d04a07757d3c44f4a1ff4ce3a7.1103.2.0.f”: CreateFile C:
\Users\Administrator\AppData\Local\kopia\8b35017875c33a80\contents/f6/0610d04a07757d3c44f4a1ff4ce3a7.1103.2.0.f: The sys
tem cannot find the file specified.
ERROR unable to add 133afb8ebf905037ee64b9830cd7ffe8.1103.2.0 to contents: can’t get mod time for file “C:\Users\Admin
istrator\AppData\Local\kopia\8b35017875c33a80\contents/13/3afb8ebf905037ee64b9830cd7ffe8.1103.2.0.f”: CreateFile C:
\Users\Administrator\AppData\Local\kopia\8b35017875c33a80\contents/13/3afb8ebf905037ee64b9830cd7ffe8.1103.2.0.f: The sys
tem cannot find the file specified.
ERROR unable to add 698eabfe0e430ca12162dbdf9e5c6391.1103.2.0 to …
My system did not run out of disk space.

Any ideas?
Thanks in advance.