After the latest update Timeshift will not start in Plasma 5.
It is, however, possible to launch the application through Konsole:
It seems to work but the following errors are produced:
(timeshift-gtk:2376): GLib-GIO-CRITICAL **: 15:04:05.159: g_file_get_path: assertion 'G_IS_FILE (file)' failed
(timeshift-gtk:2376): CRITICAL **: 15:04:05.160: tee_jee_file_system_path_combine: assertion 'path1 != NULL' failed
(timeshift-gtk:2376): CRITICAL **: 15:04:05.160: tee_jee_file_system_dir_exists: assertion 'dir_path != NULL' faile