Kaspersky block SignalR messages with error 404

Question

I use .net core 5 and SignalR to send some data to UI (angular 10). In any client that has Kaspersky installed, I get an error message:

This is negotiate message:

and this is response:

I searched in Kaspersky blogs and found that this error shows that Antivirus blocked the handshake process. If I uninstall Kaspersky, everything will be fine but I have to keep Antivirus.