Why is OneDrive showing errors when trying to move files in the online version?

Check your internet connection.
Make sure to troubleshoot any known issues with your internet connection.
Restart explorer.
Sometimes you might need to refresh the page to solve the issue.
Check your OneDrive storage.
Make sure there is available storage in your OneDrive account for the files you are trying to move.
Check the files size.
Sometimes there can be limits on how large a file you can move.
Check which files you are attempting to move.
There might be restrictions on what file types you can move.
Check any additional security that may be in place.
Ensure that your security settings are not blocking you from moving your files.