Workspace error 2306 happen when ICA file located in path which contains Chinese character.
Error message "Could not find the file named "C:\??\****.ica. Please check your installation , or contact your administrator."

The issue should be resolved in version 2309.1 and above.

From the release notes:

You might fail to start sessions if the ICA file or the folder where the ICA file is downloaded is named with Unicode or non-English characters. This issue occurs only when you access and authenticate a store using a browser and then start any app or desktop using native Citrix Workspace app. [HDX-55649]

Workarounds / Alternative solutions:

Change ICA located path with English. 

Install Client System Chinese Language Package.  (If the language was not installed)

Problem Cause

2 possible causes:

1 - Workspace App BUG

2 - Windows client cannot identify Chinese characters:



Need to install Chinese Language Package in Windows OS and make sure Windows can correctly show Chinese characters.


 

Fixed issues list: https://docs.citrix.com/en-us/citrix-workspace-app-for-windows/about.html