Re: HTTPS "Not Secure" message for Qlik Sense in Chrome and not issued by trusted cert aut
The alternative to what @ganapati_h said is to distribute the server's CA root certificate to all the clients, via group policies or other solutions. That, of course, would be complicated when the clients are not centrally-managed.
Please consider, in any case, that the default self-signed certificate will prevent you from opening apps on iOS devices (that's Apple's decision, not Qlik's) on https. We therefore recommended using a third party certificate issued by a trusted CA authority.
Daniele - Senior Technical Support Engineer at Qlik If a post helps to resolve your issue, please mark the appropriate replies as CORRECT.