If upgrading receiver doesn’t help, or if the latest version is already running on the affected workstation, next recommendation would be to perform a full uninstall of receiver utilizing the Citrix Receiver Cleanup Utility available at the following link: . The first thing to do when you get a Protocol Driver Error/Error 1046 is to verify Citrix Receiver/Workspace is upgraded to the latest version if possible or the latest version that has been validated in the destination environment. How to Resolve Protocol Driver Error/Error 1046 Below are several troubleshooting recommendations on what to try to resolve quickly. There are various reasons that Protocol Driver Error/Error 1046 could be generated, ranging from the client through to the Citrix hosting infrastructure. Messages such as “Your version of Citrix Receiver does not support selected encryption” are generated when this issue occurs. Protocol Driver Error/Error 1046 is an issue related to the client (Receiver) not being able to create a connection to the server after an application is launched.
