A common cause of failed distributions to Baker & Taylor over the past few months is an unmatched “fingerprint”:
Upload failed [99 files remaining] : fingerprint SHA256:f1DE5abC7YmC+zA0WdYUAaimU3BN4Dpcx/KqWabt3GY does not match for "econtentftp.baker-taylor.com,47.19.172.81"
To resolve, please open a support ticket. The TitleLeaf team will confirm the change with Baker & Taylor, then accept the new server certificate internally so that distributions can recommence.