SignalR working on Localhost, BUT not working on Server win server 2019 with IIS

Question

I have project with SignalR + MVC, this not working on Server win server 2019 with IIS. I Got errors:

signalr/negotiate?clientProtocol=2.1&connectionData=%5B%7B"name"%3A"feedbackhub"%7D%5D&_=1646730379815

Can anybody help me?

This all my Code: https://github.com/duc14s/SignalRFeedbackSample

Answer 1

Have you enabled websockets on the server?

• On the taskbar, click Server Manager.
• In Server Manager, click the Manage menu, and then click Add Roles and Features.
• In the Add Roles and Features wizard, click Next. …
• On the Server Roles page, expand Web Server (IIS), expand Web Server, expand - Application Development, and then select WebSocket Protocol.