Citrix Online Plug-in v12: Error 2320

Odd problem today with the XenApp client, erroring each time I tried to login to any published app:

Citrix OP Error 2320

 

After a fair bit of digging, I found a registry key call “ClientHostedApps” here:

HKEY_CURRENT_USER\Software\Citrix\ICA Client\Engine\Lockdown Profiles\All Regions\Lockdown\Virtual Channels\Control

Simply removing this key and re-opening the client was all it took for the client to operate and the apps to start working again.

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