Getting intermittent 500 0 64 on IIS logs

I am not able to get rid of this particular 500 0 64 error which I see in my IIS logs. I keep on getting errors as shown below

2019-06-06 13:05:23 W3SVC10 POST /JsEvents/Events - 443 - HTTP/1.1 Mozilla/5.0+(Windows+NT+10.0;+WOW64;+Trident/7.0;+rv:11.0)+like+Gecko 500 0 64 0 933 655

I am using Ahoy which is a javascript event tracking library in my ASP.NET MVC 5 application. This sends ajax POST to JsEventsController on every event that a user performs on the page. This can go beyond 20k per day. I have configured it as below:

ahoy.configure({
    urlPrefix: "",
    visitsUrl: '@Url.Content("~/JsEvents/Visits")',
    eventsUrl: '@Url.Content("~/JsEvents/Events")',
    page: null,
    platform: "Web",
    useBeacon: true,
    startOnReady: true,
    trackVisits: false,
    cookies: false,
    cookieDomain: null,
    headers: {},
    visitParams: {},
    withCredentials: false
});
ahoy.trackAll(false);

My controller which accepts the events is given below

[SessionState(System.Web.SessionState.SessionStateBehavior.ReadOnly)]
public class JsEventsController : Controller
{
    private static readonly Logger logger = LogManager.GetLogger("EventLogger");

    [HttpPost]
    public EmptyResult Visits(string visit_token, string visitor_token, string referrer, string landing_page)
    {
        logger.Trace(visit_token + " " + visitor_token + " " + referrer + " " + landing_page);
        return new EmptyResult();
    }

    [HttpPost]
    public EmptyResult Events(string events_json, List<AhoyEvents> events)
    {
        if (events_json != null)
        {
            logger.Trace(events_json);
        }
        if (events != null)
        {
            logger.Trace(JsonConvert.SerializeObject(events));
        }
        return new EmptyResult();
    }
}

I am using NLog for LogManager and can provide the config if needed.

EDIT

I am using Windows Server 2008 R2. I enabled FRT as @Lex Li advised. Please check the details below:

ModuleName: ManagedPipelineHandler
Notification: 128
HttpStatus: 500
HttpReason: Internal Server Error
HttpSubStatus: 0
ErrorCode: 2147943395
ConfigExceptionInfo: 
Notification: EXECUTE_REQUEST_HANDLER
ErrorCode: The I/O operation has been aborted because of either a thread exit or an application request. (0x800703e3)