Windows agent service stops

Hello all,

I noticed that one of the Windows agents has not sent logs for the past two hours. During troubleshooting, I found that the agent service repeatedly stops shortly after attempting to start.

This problem is not related to one agent, there are several agents with diff last time they send events

I also checked the agent logs and found the errors below.

Could anyone help identify the possible cause?

[error] Exception opening transport - Unable to open pipe

[error] GetDomain - no domain

[error] ExtractorGuard<class WMI::Table::Processor>::Run - Failed to extract info. Unknown exception

[error] Invalid signature of file: C:\Program Files\Fortinet\FortiSIEM\FortiSIEM.WinRTWrapper.dll

[error] FortiSIEMWinRTWrapper::LoadLib - Main Singnature is not valid for C:\Program Files\Fortinet\FortiSIEM\FortiSIEM.WinRTWrapper.dll

[error] FortiSIEMWinRTWrapper::EnumerateAppData - Library loading error

[error] CFileLogManager::GetIISSites unable to read application configuration file

[critical] Current process signature is INVALID or NOT trusted

[critical] Terminating application from driver controller