All new Qlik Sense releases beginning with February 2022 have introduced a stricter method of verifying the WebSocket Host Allow List.
This can lead to older entries being invalidated and users receiving a 400 Bad Request error when connecting to the Qlik Sense Hub.
Valid entries are:
Entries which were previously accepted, but will now be invalidated:
If you are looking for details on how to configure the WebSocket Host Allow List, we have an article ready for you: How to configure the WebSocket origin allow list and best practices.
For more information on the stricter verification, see the Qlik Sense Release Notes for February 2022 (QB-7782), as well as Invalid entries in the Qlik Sense host allow list on the virtual proxy configuration.
