NUnit 3.16 process exits abruptly

[part...@gmail.com]

We upgraded to .net 6 from 4.6.2 , nunit console version is 3.16 , We are using azure devops for triggering tests.

Tests are failing abruptly with logs

NUnit.Engine.NUnitEngineException : Unable to acquire remote process agent

2023-01-25T03:00:21.0438162Z

2023-01-25T03:00:21.0460690Z --NUnitEngineException

2023-01-25T03:00:21.0462073Z

2023-01-25T03:00:21.0484546Z Unable to acquire remote process agent

2023-01-25T03:00:21.0485932Z

2023-01-25T03:00:21.0508134Z at NUnit.Engine.Runners.ProcessRunner.CreateAgentAndRunnerIfNeeded() in C:\Users\charlie\dev\NUnit\nunit-console\src\NUnitEngine\nunit.engine\Runners\ProcessRunner.cs:line 253

2023-01-25T03:00:21.0509482Z

2023-01-25T03:00:21.0531623Z at NUnit.Engine.Runners.ProcessRunner.RunTests(ITestEventListener listener, TestFilter filter) in C:\Users\charlie\dev\NUnit\nunit-console\src\NUnitEngine\nunit.engine\Runners\ProcessRunner.cs:line 138

Anyone knows solution for this?

Thanks