I have the same issue. Without bringing any projects into my workspace this is what I did.
1 - Created a new workspace on Machine01 named "workspace"
2 - Configured my Syntax Coloring preferences on Machine01
3 - Exported my preferences from Machine01
3.a - File->Export->General->Preferences
4 - Opened CodeWarrior on Machine 02
5 - Created a new workspace on Machine02 named "workspace"
6 - Imported the preferences I exported from Machine01
6.a - File->Import->General->Preferences
7 - Closed CodeWarrior on Machine02
8 - Opened Codewarrior on Machine02 using "workspace"
9 - Get error message "Invalid workspace in use."
9.a - "The current workspace has been moved or copied from a different location in the file system.
This is not supported, and can cause unpredictable behavior. Please select another workspace."
Why would this series of operations not work? I am using Codewarrior Version 11.2, Build Id: 221206