Zero DSR 2018 here. I'm having a similar issue. I've emailed Zero with my bike logs but haven't gotten a response as yet.
I think I may be getting similar errors. From what I can see there appears to be a low motor voltage error and maybe line contactor error with Sevcon gen4 motor controller? Unfortunately no dealerships nearby in order to check
07511 02/21/2023 09:06:28 SEVCON CAN EMCY Frame Error Code: 0x3100, Error Reg: 0x05, Sevcon Error Code: 0x45C9, Data: 01 4F 68 84 01, Unknown
07512 02/21/2023 09:06:49 Disarmed PackTemp: h 27C, l 22C, PackSOC: 96%, Vpack:114.254V, MotAmps: 0, BattAmps: 0, Mods: 01, MotTemp: 34C, CtrlTemp: 26C, AmbTemp: 22C, MotRPM: 0, Odo:17041km
07513 02/21/2023 09:07:21 SEVCON CAN EMCY Frame Error Code: 0x5000, Error Reg: 0x45, Sevcon Error Code: 0x5101, Data: 07 03 03 A0 04, Unknown
07514 02/21/2023 09:07:21 SEVCON CAN EMCY Frame Error Code: 0x0000, Error Reg: 0x41, Sevcon Error Code: 0x45C9, Data: 01 51 40 B0 01, Unknown
07515 02/21/2023 09:07:21 DEBUG: Sevcon Contactor Drive OFF
07516 02/21/2023 09:07:21 DEBUG: Sevcon Has Turned Off Contactor Drive
07517 02/21/2023 09:07:21 Module 00 Opening Contactor vmod: 114.254V, batt curr: 0A
07518 02/21/2023 09:07:21 Module 01 Opening Contactor vmod: 0.000V, batt curr: 0A
07519 02/21/2023 09:07:21 Sevcon Turned Off
07520 02/21/2023 09:07:22 DEBUG: Module 00 Contactor is now Open
07521 02/21/2023 09:07:25 Sevcon Turned On
07522 02/21/2023 09:07:26 Sevcon CAN Link Up
07523 02/21/2023 09:07:26 DEBUG: Sevcon Contactor Drive ON.
07524 02/21/2023 09:07:26 Module 00 Closing Contactor vmod: 114.260V, maxsys: 114.260V, minsys: 114.260V, diff: 0.000V, vcap: 102.000V, prechg: 89%
07525 02/21/2023 09:07:27 DEBUG: Module 00 Contactor is now Closed