Unfortunately there's nothing relevant logged before the crash, there's a lot of what looks like unrelated USB log spam though:
Sep 10 20:08:10 darkonnas kernel: usb usb4-port1: Cannot enable. Maybe the USB cable is bad?
Sep 10 20:08:10 darkonnas kernel: usb usb4-port1: config error
Sep 10 20:08:14 darkonnas kernel: usb usb4-port1: Cannot enable. Maybe the USB cable is bad?
Sep 10 20:08:14 darkonnas kernel: usb usb4-port1: config error
Sep 10 20:08:18 darkonnas kernel: usb usb4-port1: Cannot enable. Maybe the USB cable is bad?
Sep 10 20:08:18 darkonnas kernel: usb usb4-port1: config error
Sep 10 20:08:22 darkonnas kernel: usb usb4-port1: Cannot enable. Maybe the USB cable is bad?
Sep 10 20:08:22 darkonnas kernel: usb usb4-port1: config error
Sep 10 20:08:26 darkonnas kernel: usb usb4-port1: Cannot enable. Maybe the USB cable is bad?
Sep 10 20:08:26 darkonnas kernel: usb usb4-port1: config error
Sep 10 20:08:30 darkonnas kernel: usb usb4-port1: Cannot enable. Maybe the USB cable is bad?
Sep 10 20:08:30 darkonnas kernel: usb usb4-port1: config error
Sep 10 20:08:35 darkonnas kernel: usb usb4-port1: Cannot enable. Maybe the USB cable is bad?
Sep 10 20:08:35 darkonnas kernel: usb usb4-port1: config error
Sep 16 23:34:51 darkonnas kernel: microcode: microcode updated early to revision 0x21, date = 2019-06-13
When there's nothing logged it's usually a hardware issue, one more thing you can try it to boot the server in safe mode with all docker/VMs disable, let it run as a basic NAS for a few days, if it still crashes it's likely a hardware problem, if it doesn't start turning on the other services one by one.