@Cameron Adams Kindly share the screenshots of the error you are experiencing to help us better understand the problem.
However, the Issue you are encountering might be due to sensitivity labels applied by the DLP policy. When sensitivity labels are applied to files, the files can't be moved in OneDrive. If this is the case, then you can try and remove the sensitivity label from the file, move the file then reapply the label. You can also try adjusting the DLP policy to allow for some operations, but this might increase the chances of data leakage.
If the issue is persisting, I recommend sharing the screenshot so that we can better understand the problem.