When opening Qlik Sense Apps in multiple IE tabs (>=6), it may show "Cannot Create Connection" errorthis is easy reproduced when turn on "Link to Sheet" under KPI chart ->Appearance->Presentation
This is due to an IE default security setting on Websocket connections is no more than 6 in regedit, for more information refer to:https://msdn.microsoft.com/library/ee330736%28v=vs.85%29.aspx?f=255&MSPPError=-2147217396#websocket_maxconn
To avoid this, please use other non-IE browsers such as Mozilla Firefox and Google Chrome.
Or change IE setting Tools > Internet Options > Security > Local Intranet > Sites uncheck "Include all local(intranet) sites not listed in other zones
" and add the address to the Zonehttp://stackoverflow.com/questions/15114279/websocket-on-ie10-giving-a-securityerror
Tested result working under IE 11 as attached screenshot for referenceNOTE: above workaround is 3rd party configuration, it may vary in different environment setup requirements. Qlik Support is NOT responsible for the configuration or settings above