big logs from cortex

[k3rnon]

Hello,
I have some problem with Cortex. Not sure how I should fix it;/. In
/var/log/cortex/application.log
In log file I get info:
[WARN] from akka.actor.ActorSystemImpl in application-akka.actor.default-dispatcher-5 - Illegal request, responding with status '505 HTTP Version Not Supported': The server does not support the HTTP protocol version used in the request.

What I should do? Sry if this is lame question... I am begginer with this...

[k3rnon]

[INFO] from play.api.Play in main - Application started (Prod)
2019-07-22 12:16:13,683 [INFO] from play.core.server.AkkaHttpServer in main - Enabling HTTP/2 on Akka HTTP server...
2019-07-22 12:16:13,684 [INFO] from play.core.server.AkkaHttpServer in main - Listening for HTTP on /0:0:0:0:0:0:0:0:9001
2019-07-22 12:16:14,641 [WARN] from akka.actor.ActorSystemImpl in application-akka.actor.default-dispatcher-5 - Illegal request, responding with status '505 HTTP Version Not Supported': The server does not support the HTTP protocol version used in the request.