If I try to run the last of the non-qt version on Fedora Linux it appears to be doing nothing. No window appears. The application does not exit.

The last log entries:
2023-04-17 21:38:24.281 WARN [ConfigDatabaseImpl #0] Unable to find config for key session
2023-04-17 21:38:24.282 WARN [ConfigDatabaseImpl #0] Unable to find config for key command_line_action
2023-04-17 21:38:24.282 WARN [ConfigDatabaseImpl #0] Unable to find config for key general
2023-04-17 21:38:24.285 WARN [ConfigDatabaseImpl #0] Unable to find config for key system
2023-04-17 21:38:24.405 INFO [LocalHttpServer #0] Local HTTP IPC server running on http://127.0.0.1:42899/fac7aa23f2de221ef39b54eb6be24ef5

The extraterm must be manually killed for it to exit.

How to debug this?