"The operation can’t be completed because you don’t have permission to access some of the items." when moving OneDrive files
Solution 1:
I had the same problem. What worked for me was to open the source file, which probably triggered the on-demand download. Then I was able to move/copy it elsewhere.
You could probably also go to OneDrive Preferences and click "Turn Off Files On-Demand"
Solution 2:
I had the same issue and had luck with the following:
Instead of dragging the folder, try to simply right click and copy from one location and then paste into the new location (one drive).
Hope this works for you as it has for me.