503 Service Unavailable - Exception thrown when opening Reporting Services Configuration Manager

Hi v-qiuyu-msft, I see two types of files: (RSHostingService_[date] and RSManagement_[date])

RSHostingServce says:

2018-01-29 14:57:13.2796|INFO|8|Throttled restart of process by 3,599,481.97ms: Management Service
2018-01-29 14:57:13.2796|INFO|8|Launching Process : Management Service
2018-01-29 14:57:13.2796|INFO|8|Starting Process: C:\Program Files\Microsoft Power BI Report Server\PBIRS\Management\RSManagement.exe
2018-01-29 14:57:13.7336|WARN|4030|Child Process [Management Service] Died. Check the log for further information

RSManagement says:

2018-01-29 14:57:13.5606|INFO|1|File Logger created: C:\Program Files\Microsoft Power BI Report Server\PBIRS\LogFiles\RSManagement_2018_01_29_14_57_13.log - level Info, will roll at 32 Mb, process id 99740
2018-01-29 14:57:13.6696|INFO|1|CFG : Dumper.path = [..\LogFiles\] (env)
2018-01-29 14:57:13.6696|INFO|1|CFG : Name = [] (env)
2018-01-29 14:57:13.6696|INFO|1|CFG : Dumper.flags = [SendToWatson, AllThreads, AllMemory] (env)
2018-01-29 14:57:13.6696|INFO|1|CFG : Dumper.preventIfContains = [Microsoft.BIServer.HostingEnvironment.Exceptions.TrustedProcessTokenExpiredException] (env)
2018-01-29 14:57:13.6696|INFO|1|Do not dump on: Microsoft.BIServer.HostingEnvironment.Exceptions.TrustedProcessTokenExpiredException
2018-01-29 14:57:13.6696|INFO|1|CFG : listenerUrl = [http://+:8083/] (env)
2018-01-29 14:57:13.6696|INFO|1|CFG : rsConfigFilePath = [..\ReportServer\rsreportserver.config] (env)
2018-01-29 14:57:13.6876|INFO|1|SKU: Power BI Report Server - Evaluation
2018-01-29 14:57:13.6876|INFO|1|Installation has expired.