If errors appear during scanning of your shares, then these are listed during scanning.
Frequent errors are for example, too long path names. The path name is composed of the computer names and all directory names down to the lowest directory. The complete length does not exceed 260 characters.
An additional problem could be that despite administrator rights you have no access to a directory. In this case, the error messageand "Access to ACL not permitted"Appears.
There have been misconfigurations to be removed before the migration.
In the project management, you find a red symbol for each project that has error messages. Use the symbol to show the messages in a list.
Once you have corrected all issues, click on "Rescan project"To scan the source again and continue with the project.