This issue is fixed in Pulse Desktop Client versions 9.1R4.1 and above. The installers can be downloaded from
https://my.pulsesecure.net/The following workarounds can still be used if needed,
Workaround 1 : Disable IPV6 on the client machine.
Workaround 2 : If disabling IPV6 on client machines is not an option and when the PCS device is running in 9.1Rx version "
Enable fail-over to TDI for Pulse SAM connection" under User Roles > Roles > SAM > options
Workaround 3 : Run the following command on the client PC which would force the PC to use IPv4 stack for all Java request
setx _JAVA_OPTIONS -Djava.net.preferIPv4Stack=true