VM: Failed to lock sudo memory is related with system memory ?

Using Linux Ubuntu 20.04 64 bits 4 GB RAM.
the message logs has several lines displaying
VM: Failed to lock sudo memory
E {PPU[0x1000000] Thread (main_thread) [0x00b86948]} VM: Failed to lock sudo memory (addr=0x37100000, size=0x100000). Consider increasing your system limits.

That issue is related with system memory not having enough free RAM ?
Even after the game is totally loaded the system has more of 1.5 GB free RAM and yet has an swap file 256 MB in zram.

Thanks for your reply.