The remote server returned an error: (414) REQUEST URI TOO LONG
MigrationWiz attempted to create a file or folder but the request was rejected because either the filename or the folder path is too long for the Destination environment.
The most common reason is that the filename or folder path at the Source is too long and cannot be replicated in the Destination environment because they have different folder path length limits.
The solution is to rename the file or 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.