I can`t join to my server

[SuperCHIROK1]

Hello, I can`t join to my server

Paper 1.16.5
Java 17

When trying to join

[22:03:29 INFO]: SuperCHIROK1 joined the game
[22:03:30 INFO]: SuperCHIROK1 logged in with entity id 236 at ([spawn]1.019082483149605, 51.5, -11.231891293328754)
[22:04:14 WARN]: SuperCHIROK1 was kicked due to keepalive timeout!
[22:04:14 INFO]: SuperCHIROK1 lost connection: Timed out
[22:04:14 INFO]: SuperCHIROK1 left the game

Sometimes when the server is shut down, this message is sent to the console
[15:57:30 ERROR]: Nag author: 'Pyr' of 'ZNPCsPlus' about the following: This plugin is not properly shutting down its async tasks when it is being shut down. This task may throw errors during the final shutdown logs and might not complete before process dies.

I suspect that ZNPCsPlus is to blame, since after removing it, everything worked fine.