A small bugfix-update (0.5.9.1) for Lutris has been released:

lutris (0.5.9.1), 17.10.2021 This is a small update to Lutris 0.5.9 to fix a number of issues: Fix possible escaping error for gamescope option Remove walrus operator to restore compatibility with Python 3.7 / Ubuntu 18.04 Remove log file being written in the home folder Fix install button for community installer Fix markup error on gamescope option Update URL for Ryujinx build Fix Steam sync creating duplicate games – Mathieu Comandon