boomaga is not working when I use flatpak application (wps-office)

[nahdd1234]

I wonder boomaga not working on any kind of linux distro.
Recently, I find out why boomaga not working on any linux distro.
Before use flatpak app, boomaga is working.
After use flatpak app, boomaga stop working.
Error message is variety.

• [Boomaga GUI] ERROR: Can't start boomaga gui.
• Can't read DBUS session direcory /var/spool/cups/tmp/.dbus/session-bus

Who know why this happen and how to solve this problem?