I know nothing about Net::SFTP::Recursive, but I'd say a folder name containing multiple "/./." and ending in NFT_0­0317_27092019_27092019191651_952.TXT is suspicious. Probably the module doesn't understand some message from your server.

Last change of the module is 2005. This is normally not a bad sign, but the SSH protocols have undergone several updates, so you might better look for something newer, even though you'd have to implement the directory recursion yourself when resorting to Net::SFTP or Net::SSH2::SFTP.