Some customers have moved to Check Point R80.30 (or they plan it).
Tufin will support R80.30 from TOS 19-1 HF3 on. (Link requires authentication to the Tufin Portal).
Earlier versions might result in problems when connecting R80.30 to Tufin.
Update August 2019: Tufin TOS 19-1 HF3 is available for download now