Libretime Master with Xubuntu 18.04.5 Replay Gain

Hello, I made a new installation of Xubuntu 18.04.5 with latest updates and Libretime Master. Nearly all what I could try is working fine. The Artworks and Track-type are beautiful makeups to simplify research of tracks. One thing is strange. In older versions of Libretime Master and Xubuntu 16.04 I got after successful file import the Replay Gain value. Now this column keeps empty. Is there a way to resolve this issue ?