I try to launch applications with m3ulcb,  when 9 or 10 applications had launched, this error may happend. Is there a solution for this error?

May 08 11:14:01 m3ulcb kernel: rcar-du feb00000.display: failed to allocate buffer with size 6471680
May 08 11:14:01 m3ulcb kernel[3584]: [ 93.648874] rcar-du feb00000.display: failed to allocate buffer with size 6471680
May 08 11:14:01 m3ulcb kernel: rcar-du feb00000.display: failed to allocate buffer with size 6471680
May 08 11:14:01 m3ulcb kernel[3584]: [ 93.667661] rcar-du feb00000.display: failed to allocate buffer with size 6471680
May 08 11:14:01 m3ulcb kernel: rcar-du feb00000.display: failed to allocate buffer with size 6471680
May 08 11:14:01 m3ulcb kernel[3584]: [ 93.700966] rcar-du feb00000.display: failed to allocate buffer with size 6471680