In every modern browser you have the possibility to run in a “PrivateMode”
This “PrivateMode” is designed to tighten up the security meanwhile browsing the internet.
This “PrivateMode” is realized in several different way depending on the browser you use.
By using a browser in “PrivateMode” or Incognito, you are not able to access a QlikSense environment (Hub / App / Mashup) due the tighten security settings activated.
By accessing a QlikSense environment QlikSense need to interact fully with the browser you use.
If this issue is IE related then to solve it, first clear the cache:SHIFT + CTRL + DEL
and delete "Cookies and website data"
If Step 1 doesn't work, try this :
Please note that Internet Explorer 11 will eventually be deprecated as Microsoft is not updating this browser anymore, and with the number of WebSocket and Security issues that cannot be addressed by Qlik since Microsoft is not updating this browser, Qlik cannot guarantee that Internet Explorer will work in Private Mode for Qlik Sense or Qlik View as of 2018.
If the issue is related to Chrome, please note that using Incognito Mode is not supported if you get the error message "private browsing Is turned on In your web browser" or "turn off private browsing". Chrome disables many features that the Qlik Hub and QMC now require when going into safe mode (Incognito Mode), and as such this mode should not be used. If Incognito Mode is the suggested browsing usage of an entire company, then a single new Chrome browser instance, without using Incognito or Private mode must be started, if Qlik is to be used.
In a support case we figured out that Qlik triggers on the "DOM Storage" if we print out the error message.
Enabling the DOM Storage again will let the browser be able to access a QlikSense environment.
Right now there is a bug (QLIK-73874) ongoing to receive clarity from R&D what we can expect.
Depending of the outcome, there will be an additional bug raised with R&D to modify the documentation on help.qlik.com