Hello TheBurpMan.
This problem is related to the mods you have installed. Specifically @DayZ-Expansion-Bundle. In such case there is nothing we can do on our end as the issue has to be fixed on the mod creators end.

Meanwhile you can try the following:

Try to verify the game and make sure your mods are up to date
If this does not help - unsubscribe and delete the mods
Delete the game profiles/configuration files
Verify the game data through Steam
Try to launch the game and join a server without mods
Subscribe back to the mods you have had previously
Regards,
Geez