article Error 400 Bad request. Unknown target URL (most likely caused by navigation using the browser back button) in Official Support Articles https://community.qlik.com/t5/Official-Support-Articles/Error-400-Bad-request-Unknown-target-URL-most-likely-caused-by/ta-p/1717637 <P>The following error may be encountered when trying to access the Hub or QMC:<BR /><BR /><FONT face="courier new,courier"><SPAN>Error 400 Bad request. Unknown target URL (most likely caused by navigation using the browser back button)</SPAN></FONT></P> <P>&nbsp;</P> <P><STRONG>Environment:</STRONG></P> <UL> <LI><LI-PRODUCT title="Qlik Sense Enterprise on Windows" id="qlikSenseEnterpriseWindows"></LI-PRODUCT>&nbsp;</LI> </UL> <P>&nbsp;</P> <P>This is a third-party load balancer issue. Most likely the network load balancer deployed in the network is using the server IP instead of the FQDN.</P> <P>Try accessing Sense using the IP directly in stead of FQDN to verify.</P> <P>If access using the IP works, contact the local network load balancer administrator.&nbsp;</P> Wed, 12 May 2021 12:05:38 GMT Chris_Rice 2021-05-12T12:05:38Z Error 400 Bad request. Unknown target URL (most likely caused by navigation using the browser back button) https://community.qlik.com/t5/Official-Support-Articles/Error-400-Bad-request-Unknown-target-URL-most-likely-caused-by/ta-p/1717637 <P>The following error may be encountered when trying to access the Hub or QMC:<BR /><BR /><FONT face="courier new,courier"><SPAN>Error 400 Bad request. Unknown target URL (most likely caused by navigation using the browser back button)</SPAN></FONT></P> <P>&nbsp;</P> <P><STRONG>Environment:</STRONG></P> <UL> <LI><LI-PRODUCT title="Qlik Sense Enterprise on Windows" id="qlikSenseEnterpriseWindows"></LI-PRODUCT>&nbsp;</LI> </UL> <P>&nbsp;</P> <P>This is a third-party load balancer issue. Most likely the network load balancer deployed in the network is using the server IP instead of the FQDN.</P> <P>Try accessing Sense using the IP directly in stead of FQDN to verify.</P> <P>If access using the IP works, contact the local network load balancer administrator.&nbsp;</P> Wed, 12 May 2021 12:05:38 GMT https://community.qlik.com/t5/Official-Support-Articles/Error-400-Bad-request-Unknown-target-URL-most-likely-caused-by/ta-p/1717637 Chris_Rice 2021-05-12T12:05:38Z