Hi,
It sounds like you're encountering an issue with installing Update Rollup 4 for System Center Service Manager 2019 on your management server.
Before you apply this update, follow these steps:
MSI (s) (68:BC) [18:21:06:280]: Product: Microsoft System Center Service Manager - Update 'Hotfix for Microsoft System Center Service Manager (KB5013428)' could not be installed. Error code 1603. Additional information is available in the log file C:\Users\svcmgrservice\AppData\Local\Temp\SCSM2019_CU_KB5013428_amd64_10.19.1035.137.msp.6.log.