MigrationWiz attempted to create a folder, but the path is too long for the Destination environment.
The most common reason for this error is that the folder path at the Source is too long and cannot be replicated in the Destination environment because there are different folder path length limits. The solution is to rename the folder path at the Source.
If migrating to OneDrive, you could also use the ShrinkFoldersMaxLength Advanced Option to help resize the folder path automatically.
Use the Advanced Option in MigrationWiz to enable the use of 400 characters for the file path name. For more information, see Cannot create document: Path too long (maximum 400).