Flatpak Losslesscut Opening Error

Hello,

I installed flatpak Losslesscut in Chromebook Linux. It seems successfully done and it seems working ok.

But everytime when I open Losslescut in termial, error message comes up.

Could anyone advise how to remove the error message??

xxxxxxxxx@penguin:~$ flatpak run no.mifi.losslesscut
[3:0714/185511.402318:ERROR:bus.cc(399)] Failed to connect to the bus: Failed to connect to socket /run/dbus/system_bus_socket: No such file or directory
[3:0714/185516.452261:ERROR:bus.cc(399)] Failed to connect to the bus: Failed to connect to socket /run/dbus/system_bus_socket: No such file or directory
[3:0714/185516.455109:ERROR:bus.cc(399)] Failed to connect to the bus: Failed to connect to socket /run/dbus/system_bus_socket: No such file or directory
[32:0714/185521.354375:ERROR:gl_surface_presentation_helper.cc(260)] GetVSyncParametersIfAvailable() failed for 1 times!
[32:0714/185521.367099:ERROR:gl_surface_presentation_helper.cc(260)] GetVSyncParametersIfAvailable() failed for 2 times!
[32:0714/185522.721903:ERROR:gl_surface_presentation_helper.cc(260)] GetVSyncParametersIfAvailable() failed for 3 times!