Hi  @hashmi,

Please have a look at the following content:-

K2 blackpearl Server service - Error Invoking 'StartHostServer' : The type initializer for '<Module>' threw an exception. Stopped Hosting Server Runtime:

https://community.k2.com/t5/K2-blackpearl-Articles/K2-blackpearl-Server-service-Error-Invoking-StartHostServer-The/ta-p/95467

K2 Configuration Service error when starting K2 Server in console mode: "Invoking 'StartHostServer': SourceCode.HostServerLib: Object reference not set to an instance of an object":

https://help.k2.com/support-services/kbt167340

Issue with Starting the host server services

https://community.k2.com/t5/K2-blackpearl-Articles/Issue-with-Starting-the-host-server-services/ta-p/79897?nobounce

K2 Server service fails to start after upgrade to 5.3 when K2 is configured to use SQL Server alias

https://help.k2.com/support-services/kbt167575

K2 Service not starting after new install

https://community.k2.com/t5/K2-blackpearl-Articles/K2-Service-not-starting-after-new-install/ta-p/93593?nobounce

Receiving error 2001 Error Starting Host Server: Object reference not set to an instance of an object after enabling SmOs services endpoints:

https://help.k2.com/support-services/kbt143410

All the best.

Good day Hashmi,

Please have a look at the following KB articles.

(1)  https://help.k2.com/support-services/kbt167340

(2) https://help.k2.com/support-services/kbt143410

Best regards,

Dumisani

Hi Hashmi

This error it shows that  k2 service is not running, did you try to restart k2 services?

Regards

Elvis