the system is opensuse 42.3
Desktop Environment gnome
enter the password after restart. After a black screen, it is still the login interface. There is no such problem when logging in with root

the following is the information about the .xsession-errors-:0 file in the user directory.

Jun 05 09:11:30 localhost systemd[3095]: Startup finished in 30ms.
Jun 05 09:11:33 localhost gnome-session-binary[3132]: WARNING: Could not make bus activated clients aware of QT_IM_MODULE=ibus environment variable: :
Jun 05 09:11:33 localhost gnome-session-binary[3132]: WARNING: Could not make bus activated clients aware of XMODIFIERS=@im=ibus environment variable: :
Jun 05 09:11:33 localhost gnome-session-binary[3132]: WARNING: Could not make bus activated clients aware of GNOME_DESKTOP_SESSION_ID=this-is-deprecated environment variable: :
Jun 05 09:11:33 localhost gnome-session-binary[3132]: WARNING: Could not make bus activated clients aware of XDG_MENU_PREFIX=gnome- environment variable: :
Jun 05 09:11:33 localhost gnome-session-binary[3132]: WARNING: Could not make bus activated clients aware of QT_QPA_PLATFORMTHEME=qgnomeplatform environment variable: :
Jun 05 09:11:33 localhost gnome-session-binary[3132]: WARNING: Lost name on bus: org.gnome.SessionManager
Jun 05 09:13:31 localhost systemd[3095]: Stopped target Default.

this problem has occurred before. I have no choice but to reinstall the system to find out whether this is the conflict between ibus and fcitx. I may have changed the language environment before. In addition, how can I fix it