Strawberry Music Player no longer starts

$ strawberry 17:50:33.254 INFO main:165 Strawberry is already running - activating existing window (1) 17:50:38.256 WARN unknown Connection timed out 17:50:38.256 ERROR main:168 Could not send message to primary instance. For some reason strawberry thinks that there is an instance running and times out connecting to it - because there is nothing running. Trying to start as root works (but no sound and running as root is not a solution anyway). All files related to strawberry have already been purged, including strawberry itself, but the error persists after a fresh install. $ strawberry --version Strawberry 1.0.23 $ pgrep -f strawberry (no output) $ ps aux | grep '[s]trawberry' (no output) $ cat /etc/os-release command NAME="Linux Mint" VERSION="21.2 (Victoria)" ID=linuxmint ID_LIKE="ubuntu debian" PRETTY_NAME="Linux Mint 21.2" VERSION_ID="21.2" VERSION_CODENAME=victoria UBUNTU_CODENAME=jammy I found this error message in the code, but it hasn't helped me to solve this problem. https://github.com/strawberrymusicplayer/strawberry/blob/master/src/main.cpp CommandlineOptions options(argc, argv); { // Only start a core application now, so we can check if there's another instance without requiring an X server. // This MUST be done before parsing the commandline options so QTextCodec gets the right system locale for filenames. QCoreApplication core_app(argc, argv); KDSingleApplication single_app(QCoreApplication::applicationName(), KDSingleApplication::Option::IncludeUsernameInSocketName); // Parse commandline options - need to do this before starting the full QApplication, so it works without an X server if (!options.Parse()) return 1; logging::SetLevels(options.log_levels()); if (!single_app.isPrimaryInstance()) { if (options.is_empty()) { qLog(Info) << "Strawberry is already running - activating existing window (1)"; } if (!single_app.sendMessage(options.Serialize())) { qLog(Error) << "Could not send message to primary instance."; } return 0; } }