Qlik Sense Enterprise on Windows is installed on a Windows 2012 R2 server.
Accessing the Hub leads to:
An error occurred
The proxy is waiting for a new session.
![error hub.png error hub.png](https://community.qlik.com/t5/image/serverpage/image-id/72045iE73C3D0FFC7E0B93/image-size/large?v=v2&px=999)
Environment
Resolution
Verify if PKCS is disabled.
If PKCS is disabled, it will need to be enabled and the Windows host restarted.
Example using IISCrypto:
![iicrypto.png iicrypto.png](https://community.qlik.com/t5/image/serverpage/image-id/72046iDCB99D389695CAF5/image-size/large?v=v2&px=999)
Cause
Some required cipher suits for TLS 1.2 are not available on Windows Server 2012 R2.
For more information (Windows 2012 R2 and Windows 8.1) see https://docs.microsoft.com/en-us/windows/win32/secauthn/tls-cipher-suites-in-windows-8-1
The most common used TLS Ciphers are:
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
These are not available on 2012R2 and, unfortunately, cannot be added.
Any customer that wants to keep their current schannel configuration would need to move to Windows Server 2016\19.
Related Content
IISCrypto
Internal Investigation ID(s)
Jira QB-8951