Search for this in your registry and delete if under a Citrix parent node:
ClientHostedApps
Refer: http://support.citrix.com/article/CTX132875/
Symptom Error Message, when trying to connect via Remote Desktop:
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Error number 2320
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Citrix online plug-in Configuration Manager: No value could be found for (ClientHostedApps) that satisfies all lockdown requirements. The lockdown requirements in force may be conflicting.
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OK
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