https://community.qlik.com/t5/QlikView/Connection-to-qlik-engine-failed-for-unespecific-reasons-with/m-p/1807433#M1312788 <P>Is the fqdn of the qlik sense server that the users use in the url whitelisted in the virtual proxy that they're using?</P><P>And check that websocket connections are working and stable. Is there a http proxy involved between the users browsers and the Qlik Sense server? If so make sure it supports websockets properly and upgrades http connections as needed.</P> Wed, 12 May 2021 16:37:04 GMT Gysbert_Wassenaar 2021-05-12T16:37:04Z https://community.qlik.com/t5/QlikView/Connection-to-qlik-engine-failed-for-unespecific-reasons-with/m-p/1807428#M1312786 <P>Hi Team,&nbsp;</P><P>We have several users accessing via Key-cloak (external clients). But with a group of them from a specific Client is receiving a message " Connection to Qlik Sense engine failed for Unspecific reasons".&nbsp;</P><P>If I impersonate the users directly on Key-Cloak I can access Qlik and running apps without issues.</P><P>Could you please assist?</P><P>Thank you</P><P>&nbsp;</P> Mon, 26 Jan 2026 18:19:17 GMT https://community.qlik.com/t5/QlikView/Connection-to-qlik-engine-failed-for-unespecific-reasons-with/m-p/1807428#M1312786 MNGM 2026-01-26T18:19:17Z https://community.qlik.com/t5/QlikView/Connection-to-qlik-engine-failed-for-unespecific-reasons-with/m-p/1807433#M1312788 <P>Is the fqdn of the qlik sense server that the users use in the url whitelisted in the virtual proxy that they're using?</P><P>And check that websocket connections are working and stable. Is there a http proxy involved between the users browsers and the Qlik Sense server? If so make sure it supports websockets properly and upgrades http connections as needed.</P> Wed, 12 May 2021 16:37:04 GMT https://community.qlik.com/t5/QlikView/Connection-to-qlik-engine-failed-for-unespecific-reasons-with/m-p/1807433#M1312788 Gysbert_Wassenaar 2021-05-12T16:37:04Z