Disconnected while requesting ApiVersion on MacOS

[upsilon-den]

librdkafka = 1.8.2
macOS = BigSur 11.6
kafka broker = 2.6.1

When I"m trying to create a simple consumer and list topics, I got the error
Disconnected while requesting ApiVersion: might be caused by incorrect security.protocol configuration (connecting to a SSL listener?) or broker version is < 0.10 (see api.version.request) (after 5ms in state APIVERSION_QUERY)

The broker doesn't have any security protocols, all is PLAINTEXT

The same on Linux is working.

Is it something with certificates or something else?