EPA fails to launch after upgrade to 13.0-47.24 with Error message:

Forbidden : You don't have permission to access this resource.

Upgrade ADC to latest build 13.0-58.32 (or later) or 12.1-57.xx

Workaround :: Manually upload the nsepa_setup.exe binary to directory :: /var/netscaler/gui/vpns/scripts/vista/ EPA

Executable Binary for 13.0-47.24 here :: https://citrix.sharefile.com/share/view/s31a4aca9eef4c148

The issue occurs because of failing un-tarring option and the workaround is to replace the missing files from a working ADC of same version and create the proper symbolic links so that EPA files can be fetched.

Snapshot from working 13.0 ADC
===========================
root@ns# pwd
/var/netscaler/gui/epa/scripts/win
root@ns# ls -lrth
total 14672
-rwxr-xr-x  1 root  513   5.7M May 11 04:43 nsepa_setup.exe
-rwxr-xr-x  1 root  513   8.6M May 11 04:43 epaPackage.exe

root@ns# pwd
/netscaler/ns_gui/epa/scripts/win
root@ns# ls -lrth
total 0
lrwxr-xr-x  1 root  wheel    49B May 11 05:15 epaPackage.exe -> /var/netscaler/gui/epa/scripts/win/epaPackage.exe
lrwxr-xr-x  1 root  wheel    50B May 11 05:15 nsepa_setup.exe -> /var/netscaler/gui/epa/scripts/win/nsepa_setup.exe

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Problem Cause

Known bugs NSHELP-22157 and CGOP-11956

Fail decompressing (untar) EPA executable in /var/netscaler/gui/vpns/scripts/vista/ directory after upgrade to 12.1 or 13.0-47.24