Unable to open an older .xaml code in 2018.4.6

After updating to newer Uipath version (to 2018.4.6), a .xaml code created in an older version of Uipath won’t open.

We’ve already tried in different machines with same Uipath version.

Hi @pbal,
Welcome to the Community!
What kind of error message do you have? At which part errors is showing (when you are navigating to the path or just at very beginning where you are clicking in program to upload)?