Monitoring app task error HTTP protocol error 400 (The http request header is incorrect.)

[Jack_Guo]

The Qlik Sense License and Operations Monitor App may fail with:

HTTP protocol error 400 (The http request header is incorrect.)

Environment

• Qlik Sense Enterprise on Windows all versions

Resolution

Verify that the Qlik Sense server domain URL is correctly added as an allowed host in the virtual proxy.

Example: If your Qlik Sense Enterprise on Windows server URL is qlikserver1.domain.com, add qlikserver1.domain.com. 

See How to configure the WebSocket origin allow list and best practices for instructions.