Failed To Authenticate Against The Selected Server

[spawninc]

I received the below message when I open the Qlik Sense Desktop. It was no problem yesterday, how can I resolve this issue? IT looks like a few users encountered the issue but no solutions found in the community group.

Failed To Authenticate Against The Selected Server. Please make sure internet connection is working and try again

[Marcoimp]

Hi,
First of all, have you a Qlik Sense Server that can autheticate users (Enterprise or Business SaaS)?
From 14th July Desktop version is not free anymore:
https://community.qlik.com/t5/Qlik-Support-Updates-Blog/Changes-to-Qlik-Sense-Desktop-in-2020/ba-p/1...

[spawninc]

Yes I am aware of that. 

I click in the Log in link, it will prompt the same error msg instead of prompting for login and password

[Ahmad]

I have (Enterprise or Business SaaS) how I can make it authenticate my desktop version 

[Marcoimp]

Have you sent users the client authentication?
https://help.qlik.com/en-US/sense/June2019/Subsystems/ManagementConsole/Content/Sense_QMC/configure-...