https://community.qlik.com/t5/Scalability/Connection-Error-with-QlikSense-Scalability-Tool/m-p/2457936#M1937 <P>Hello,&nbsp; I'm trying to evaluate the performance of QlikSense apps using the Scalability Tool (QSEST), but I keep getting connectivity issues.&nbsp;Appreciate any suggestions on how to resolve the problem.<BR /><BR /><BR /></P> Thu, 30 May 2024 16:16:11 GMT Kritika 2024-05-30T16:16:11Z https://community.qlik.com/t5/Scalability/Connection-Error-with-QlikSense-Scalability-Tool/m-p/2457936#M1937 <P>Hello,&nbsp; I'm trying to evaluate the performance of QlikSense apps using the Scalability Tool (QSEST), but I keep getting connectivity issues.&nbsp;Appreciate any suggestions on how to resolve the problem.<BR /><BR /><BR /></P> Thu, 30 May 2024 16:16:11 GMT https://community.qlik.com/t5/Scalability/Connection-Error-with-QlikSense-Scalability-Tool/m-p/2457936#M1937 Kritika 2024-05-30T16:16:11Z https://community.qlik.com/t5/Scalability/Connection-Error-with-QlikSense-Scalability-Tool/m-p/2458958#M1938 <P>Hi,&nbsp;</P> <P>First of all, can you check your websocket connectivity by using&nbsp;<A href="https://community.qlik.com/t5/Official-Support-Articles/Qlik-Sense-Websocket-Connectivity-Tester/ta-p/1716909" target="_blank">https://community.qlik.com/t5/Official-Support-Articles/Qlik-Sense-Websocket-Connectivity-Tester/ta-p/1716909</A></P> <P>After this, error 400 Bad header is usually, in Qlik Sense, due to an error in your Virtual Proxy, because Qlik Sense address (external IP or FQDN, ect. ) is missing in the white host list section.&nbsp;<BR /><BR /></P> <P>In my memories, this tool use an header authentication, right ? If yes, then check the associated virtual proxy.&nbsp;</P> <P>Kind regards</P> Tue, 04 Jun 2024 05:31:47 GMT https://community.qlik.com/t5/Scalability/Connection-Error-with-QlikSense-Scalability-Tool/m-p/2458958#M1938 mpc 2024-06-04T05:31:47Z