Citrix Xenapp Web Plugin -

Do not invest time in fixing it. Invest time in migrating off it. Modern Citrix Workspace app + StoreFront or HTML5 access is faster, more secure, and infinitely less frustrating.

:: Check installed plugin versions (Windows) reg query "HKLM\SOFTWARE\Citrix\Plugins\XenApp" /v Version :: Verify ActiveX control is registered reg query "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\wfica32.exe" citrix xenapp web plugin

:: Re-register the control (IE 32-bit only) regsvr32 "C:\Program Files (x86)\Citrix\ICAClient\Plugins\wficat.cab\wfica.ocx" For its time (2005–2012), the XenApp Web Plugin was a clever solution. It turned a clunky ICA file download into a one-click web experience. But by 2015, it was a legacy liability—an insecure, browser-bound bottleneck. Do not invest time in fixing it

Have you inherited a XenApp 6.5 environment? Share your war stories in the comments. :: Check installed plugin versions (Windows) reg query

Note: This plugin is a legacy component (circa 2008–2014), largely replaced by Citrix Receiver and now Citrix Workspace. However, it is still relevant for environments running older versions like XenApp 5, 6, or 6.5. If you are managing a legacy Citrix environment (XenApp 6.5 or earlier), you have encountered the Citrix XenApp Web Plugin . Before the era of the unified Citrix Receiver, this plugin was the primary gateway for end-users to access published applications and desktops via a web browser.

:: Clear plugin cache (common fix for "cannot launch app") del /q "%USERPROFILE%\AppData\Local\Citrix\Plugins\Cache*.*"