Log out of Access Evo, clear your browser's cookies and cache (Shift + F5), and check for Citrix updates.
In the taskbar, click the up arrow (^), right-click the Citrix icon, and click Check for Updates.
If an update is available, close Access Evo, install the update, and restart your computer.
Log back in to Access Evo.
If you are still seeing this error, contact support. See Get support in Dimensions.