the game has a checksum that is calculated based on the Sim state.
If this checksum is not equal to host/client/replay then you will get a desync.
That means your game does not execute the same commands or has not the same data then other games.
This happens when you have different game or modfiles than your host/client or replay.
Have in mind there can be several mod folders.
Mods can also be installed as *.SCD archive inside the gamedata folder.
After viewing your log, i would suggest:
- Go to steam and make a filecheck to validate your base game files.
- go to
C:\ProgramData\FAForever\gamedata\
and delete everything inside the gamedata folder. - Update the FAF client and downlaod the latest FAF game version (host a game alone to update the files)
Then try again.
(without mods please)