So after the recent patch I was hoping that every problem that the update had broken, and as always it didn’t. After several attempts on fixing the constant crashing (testing addon by addon, reinstalling the server, testing legacy vs. workshop…) I just finally gave up. The server is a Sandbox server with 12 slots, no lag problems, around 40 addons and 5-7 manual addons.
CPU: Intel Core i5-4690K (2 cores)
RAM: 8Gb DDR3
OS: Windows Server 2012 R2
Note: This is a virtual OS running on Virtualbox
Thanks for your help!