Sending too many dvars to a client

Hello everyone, I have problems with some players and they are sending this error. They have to try to reconnect several times until they succeed

As I was able to investigate, they told me that this is what it is about.

“From what I can see on their official GitHub, this error only usually happens when you are sending too many dvars to a client who’s connection cannot handle them.”

From what I read and have seen its just a weird error that pops up. I’ve had it in the past and have just rejoined the server and it was fixed.

Have they tried reinstalling the game?

Is that server running mods?

No. I have it without MODS and without an administration program. I mean iw4admin oh the B3.

I have it very basic. to rule out conflicts