This error occurs when there are too many characters in a file path name in OneDrive for Business. OneDrive for Business now supports file path names with up to 400 characters. Read the New MAXPATH limits in SharePoint and OneDrive article from Microsoft for more information.
IncreasePathLengthLimit=1 Advanced Spport Option to circumvent this error. Add
IncreasePathLengthLimit=1 to your project to allow MigrationWiz to take advantage of the 400-character limit. Read the What would I use the Advanced Option IncreasePathLengthLimit=1 for? article for more information.