There are a few potential causes for this error when using Docker’s COPY command. One possible cause is that you have specified an incorrect path for the source file or directory you are trying to copy. Make sure that you have correctly spelled the path and that it exists on your local file system.

Another possible cause is that you do not have the necessary permissions to read or write to the source file or directory. Make sure that you have the necessary permissions to access the file or directory.

It’s also possible that there may be issues with the destination directory or volume that you are trying to copy the files to. Make sure that the destination directory or volume exists and that you have the necessary permissions to write to it.

Finally, this error can also occur if there is an issue with the Docker daemon itself. If you are experiencing this error consistently, it may be worth restarting the Docker daemon to see if that resolves the issue.