Cities Skylines crashes everytime I load my save game

This particular save game worked fine for me until last night, when it crashed and it crashes every time since then. This is what displays in the log file:

ERROR: ld.so: object '/home/nickg2794/.steam/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
ERROR: ld.so: object '/home/nickg2794/.steam/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
Setting breakpad minidump AppID = 255710
Steam_SetMinidumpSteamID:  Caching Steam ID:  76561198296880421 [API loaded no]
ERROR: ld.so: object '/home/nickg2794/.steam/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
Loading Mono
Mono location: /home/nickg2794/.steam/steam/steamapps/common/Cities_Skylines/Cities_Data/Mono/x86_64
Native OpenGL graphics device hijacked
Loading Steamworks
Steam ID: 255710 [Message]
Timed out waiting for game mapping!

These are my system specs:

OS: Linux 4.4 LinuxMint 18 64bit
Language: English
CPU: Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz (4 core(s))
System Memory: 7936
Gfx Device: GeForce GT 710/PCIe/SSE2
Gfx Version: OpenGL 4.5 [4.5.0 NVIDIA 361.42]
Gfx Memory: 2048
Gfx Shader Model: 30
Game Version: 1.5.0-f4-steam-linux

If anyone has any idea how to get the game working again I would appreciate it. Thank you!